We have two little boys, Theodore Gregory and Jack Robert. Not sure if the third baby is a girl or boy but we’d love a name that fits with theirs and possibly is four letters or has a four letter nickname like Theo.
Thank you!
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Welcome to Nameberry, @mamaofthreetobe !
I love your style. Theo, Jack and:
Owen
Leon
Otis
Toby (Tobias)
Beau
Nate (Nathaniel)
Luke
William (Will)
Hugo
Nora
Kate
Isla
Hope
Ella
Ruby
Lucy
Iris
Lila
Tess
2 Likes
Theodore, Jack and …
Arlo
Arthur nn Arty
Albert nn Bert
Christopher nn Kitt
Chad
Frederick nn Fred
Jonathon nn Jono
Jude
Luke
Liam
Levi
Milo
Oliver nn Olly
Otis
Rory
Stanley nn Stan
Todd
Tobias nn Toby
William nn Bill / Will
Zachary nn Zach
Theodore, Jack and …
Anna
Anya
Evie
Iris
Juno
Kate
Lara
Luna
Lily
Lola
Lila
Lark
Mila
Nora
Orla
Opal
Rose
Wren
X
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Theo and Jack are great names. With them I like:
Hugo
Jude
Rafael ‘Rafe’
Otto
Bastian ‘Bash’
Milo
Rory
Arlo
Dashiell ‘Dash’
Elio
Finnegan ‘Finn’
Remy
Edward ‘Eddy’
Otis
Roman ‘Rome’
Tully
Wilfred ‘Wilf’
Dane
Oliver ‘Olly’
Matilda ‘Tilly’
Eleanor ‘Nell’
Kaia
Freya ‘Frey’
Edie
Clementine ‘Clem’
Alma
June/Juno
Orla
India ‘Indi’
Tallulah ‘Lula’
Olive ‘Olly’ ‘Livy’
Elke
Aurora ‘Rory’
Willa
Delphine ‘Dell’
Isobel ‘Isby’
Zola
Evelyn ‘Evey’
Alba
Hope this helps!
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Hello and sorry for any repeats 
Theo, Jack &
Lila or Delilah nn Lila
Lily/Lili
Mina
Rose or Rosemary nn Rose
Anna or Annabelle nn Anna
Iris
Lucy or Lucinda nn Lucy/Lulu/Luce
Louisa nn Lulu
Evie or Evelyn/Evangeline/Genevieve nn Evie
Nora or Eleanor nn Nora
Mary or Miriam/Margot nn Mimi
Mila
Addy or Adeline nn Addy
Georgia/Georgina nn Gigi
Helena/Elena nn Lena
Camila ‘Cami’
Luke/Luca
Paul
Elio
Maximus ‘Maxi’
Benjamin ‘Benji’
Bennett ‘Benn’
Calvin ‘Cali’
Oliver nn Olli
Gabriel nn Gabe
William ‘Liam’
Leon
Noah
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Theodore ‘Theo’ and Jack are great names! I love the suggestions by previous posters but here are some more ideas for their sibling.
Rosa
Evie
Elsa
Noor, Eleonore
Leah
Maya
Abby, Abigail
Emma
Sara
Liam
Stan
Alex, Alexander
Timo
Nico, Nicolas
Matt, Matthias, Matthew
Bram
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Paul
William (“Will”)
Eugene (“Gene”)
Edward (“Ward”)
Bernard (“Bear”)
Walter (“Walt”)
Clifford (“Ford”)
Joseph (“Joey”)
Vern
Hugh
Lucy
Mary
Catherine (“Cate”)
Reba
Kate
Rose
Nina
Frances (“Fran”)
Edith (“Edie”)
Helen (“Nell”)
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[name_u]Theo[/name_u], [name_m]Jack[/name_m], and…
[name_f]Abigail[/name_f] nn [name_u]Abby[/name_u]
[name_f]Amelia[/name_f] nn [name_f]Mila[/name_f]
[name_f]Caroline[/name_f] nn [name_u]Cali[/name_u]
[name_f]Catherine[/name_f] nn [name_f]Cate[/name_f]
[name_f]Eleanor[/name_f] nn [name_f]Elle[/name_f]/[name_f]Nell[/name_f]/[name_f]Nora[/name_f]
[name_f]Elizabeth[/name_f] nn [name_f]Elle[/name_f]/[name_f]Beth[/name_f]/[name_f]Lily[/name_f]/[name_f]Liza[/name_f]
[name_f]Felicity[/name_f] nn Liss
[name_f]Georgia[/name_f] nn [name_f]Gigi[/name_f]
[name_f]Isabella[/name_f] nn [name_u]Izzy[/name_u]
[name_f]Josephine[/name_f] nn [name_f]Posy[/name_f]
[name_f]Katherine[/name_f] nn [name_f]Kate[/name_f]
[name_f]Madeline[/name_f] nn Madi
[name_f]Penelope[/name_f] nn [name_f]Nell[/name_f]/[name_f]Lola[/name_f]
[name_u]Vivian[/name_u]/[name_f]Vivienne[/name_f] nn [name_f]Vivi[/name_f]
[name_f]Genevieve[/name_f] nn [name_f]Vivi[/name_f]/[name_f]Evie[/name_f]
[name_f]Evangeline[/name_f] nn [name_f]Evie[/name_f]
[name_f]Aria[/name_f]
[name_f]Ayla[/name_f]
[name_f]Maya[/name_f]
[name_f]Cora[/name_f]
[name_f]Coralie[/name_f]/[name_f]Coraline[/name_f] nn [name_f]Cora[/name_f]
[name_f]Delilah[/name_f] nn [name_f]Lila[/name_f]
[name_f]Lila[/name_f]
[name_f]Emmeline[/name_f] nn [name_f]Emmy[/name_f]/[name_f]Emme[/name_f]
[name_u]Eden[/name_u]
[name_f]Estelle[/name_f] nn [name_f]Elle[/name_f]
[name_f]Eloise[/name_f]/[name_f]Elodie[/name_f] nn [name_f]Elle[/name_f]/[name_f]Lola[/name_f]
[name_f]Iris[/name_f]
[name_f]Isla[/name_f]
[name_f]Jane[/name_f]
[name_f]Lily[/name_f]
[name_f]Lola[/name_f]
[name_f]Lucy[/name_f]
[name_f]Lucille[/name_f] nn [name_f]Lucy[/name_f]
[name_f]Luna[/name_f]
[name_f]Lorelei[/name_f] nn [name_f]Lola[/name_f]/[name_u]Rory[/name_u]
[name_f]Aurora[/name_f] nn [name_u]Rory[/name_u]
[name_f]Rose[/name_f]
[name_u]Romy[/name_u]
[name_u]Ruby[/name_u]
[name_f]Thea[/name_f]
[name_f]Vera[/name_f]
[name_f]Zara[/name_f]
[name_m]Alexander[/name_m] nn [name_u]Alex[/name_u]
[name_m]Nathaniel[/name_m]/[name_m]Nathan[/name_m] nn [name_m]Nate[/name_m]
[name_m]Sebastian[/name_m] nn Bash/Sebi
[name_m]Gabriel[/name_m] nn [name_m]Gabe[/name_m]
[name_m]William[/name_m] nn [name_m]Will[/name_m]
[name_m]Henry[/name_m] nn [name_m]Huck[/name_m]
[name_m]Julian[/name_m] nn [name_u]Jude[/name_u]
[name_u]Jude[/name_u]
[name_m]Nicholas[/name_m] nn [name_u]Nico[/name_u]
[name_m]Leon[/name_m]
[name_u]Everett[/name_u] nn Rett
[name_m]Finnegan[/name_m]/[name_u]Finley[/name_u]/[name_m]Finnian[/name_m] nn [name_u]Finn[/name_u]
[name_u]Ezra[/name_u]
[name_m]Andrew[/name_m] nn [name_u]Drew[/name_u]
[name_m]Abel[/name_m]
[name_m]Alec[/name_m]
[name_m]Adam[/name_m]
[name_m]Axel[/name_m]
[name_u]Beau[/name_u]
[name_u]Dean[/name_u]
[name_u]Finn[/name_u]
[name_m]Luke[/name_m]
[name_m]Milo[/name_m]
[name_m]Oscar[/name_m] nn [name_m]Ozzy[/name_m]
[name_m]Tobias[/name_m] nn [name_u]Toby[/name_u]
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Thank you! We just found out that it’s a girl! I’m really loving [name_f]Lucy[/name_f]. Any middle name suggestions?
[name_f]Lucy[/name_f] [name_f]Adeline[/name_f]
[name_f]Lucy[/name_f] [name_f]Margot[/name_f]
[name_f]Lucy[/name_f] [name_f]Madeleine[/name_f]
[name_f]Lucy[/name_f] [name_u]Evelyn[/name_u]
[name_f]Lucy[/name_f] [name_f]Charlotte[/name_f]
[name_f]Lucy[/name_f] [name_f]Abigail[/name_f]
[name_f]Lucy[/name_f] [name_f]Florence[/name_f]
[name_f]Lucy[/name_f] [name_f]Matilda[/name_f]
[name_f]Lucy[/name_f] [name_f]Pearl[/name_f]
[name_f]Lucy[/name_f] is so pretty!
[name_f]Lucy[/name_f] [name_f]Adelaide[/name_f]
[name_f]Lucy[/name_f] [name_f]Adeline[/name_f]
[name_f]Lucy[/name_f] [name_f]Aurora[/name_f]
[name_f]Lucy[/name_f] [name_f]Annabel[/name_f]
[name_f]Lucy[/name_f] [name_f]Beatrice[/name_f]
[name_f]Lucy[/name_f] [name_f]Coraline[/name_f]
[name_f]Lucy[/name_f] [name_f]Cordelia[/name_f]
[name_f]Lucy[/name_f] [name_f]Caroline[/name_f]
[name_f]Lucy[/name_f] [name_u]Camille[/name_u]
[name_f]Lucy[/name_f] [name_f]Charlotte[/name_f]
[name_f]Lucy[/name_f] [name_f]Delilah[/name_f]
[name_f]Lucy[/name_f] [name_f]Eleanor[/name_f]
[name_f]Lucy[/name_f] [name_f]Eloise[/name_f]
[name_f]Lucy[/name_f] [name_f]Emmeline[/name_f]
[name_f]Lucy[/name_f] [name_u]Evelyn[/name_u]
[name_f]Lucy[/name_f] [name_f]Evangeline[/name_f]
[name_f]Lucy[/name_f] [name_f]Estelle[/name_f]
[name_f]Lucy[/name_f] [name_f]Florence[/name_f]
[name_f]Lucy[/name_f] [name_f]Georgia[/name_f]
[name_f]Lucy[/name_f] [name_f]Genevieve[/name_f]
[name_f]Lucy[/name_f] [name_f]Isabelle[/name_f]/[name_f]Isabel[/name_f]/[name_f]Isobel[/name_f]
[name_f]Lucy[/name_f] [name_f]Madeline[/name_f]/[name_f]Madeleine[/name_f]
[name_f]Lucy[/name_f] [name_f]Margaret[/name_f]
[name_f]Lucy[/name_f] [name_f]Mirabel[/name_f]
[name_f]Lucy[/name_f] [name_f]Margot[/name_f]
[name_f]Lucy[/name_f] [name_f]Rose[/name_f]
[name_f]Lucy[/name_f] [name_f]Violet[/name_f]
[name_f]Lucy[/name_f] [name_u]Vivian[/name_u]/[name_f]Vivienne[/name_f]
[name_f]Lucy[/name_f] [name_f]Victoria[/name_f]
[name_f]Lucy[/name_f] [name_u]Willow[/name_u]
[name_u]Theo[/name_u], [name_m]Jack[/name_m], and
[name_f]Ella[/name_f]
[name_f]Jane[/name_f]
[name_f]Leah[/name_f]
[name_f]Macy[/name_f]
[name_f]Maya[/name_f]
[name_f]Miranda[/name_f] ([name_f]Mira[/name_f]/[name_f]Miri[/name_f])
[name_f]Nola[/name_f]
[name_f]Sara[/name_f]
[name_m]Adam[/name_m]
[name_m]Hugh[/name_m]
[name_m]Hugo[/name_m]
[name_u]Michael[/name_u]
[name_m]Nicholas[/name_m]
[name_u]Stanley[/name_u]
[name_u]Wren[/name_u]
I keep going back to [name_f]Rosie[/name_f] or [name_f]Rose[/name_f] for a girl! [name_m]Theodore[/name_m] and [name_m]Jack[/name_m] are so handsome.
Congratulations!
alternatives to [name_f]Lucy[/name_f] could be
[name_f]Evie[/name_f]
[name_f]Leda[/name_f]
[name_f]Lulu[/name_f]
[name_f]Lola[/name_f]
[name_f]Gaia[/name_f]
[name_f]Iris[/name_f]
[name_f]Maud[/name_f]
?
But middle name ideas could be
Ophelia
[name_f]Eliza[/name_f]
[name_f]Felicity[/name_f]
[name_f]Florence[/name_f]
[name_f]Madeleine[/name_f]
[name_f]Imogen[/name_f]
[name_f]Octavia[/name_f]
[name_f]Georgina[/name_f]
Mila
[name_f]Lea[/name_f]
[name_f]Ivy[/name_f]
[name_u]Eden[/name_u]
[name_f]Ally[/name_f]
[name_f]Elle[/name_f]
[name_f]Isla[/name_f]
Milo
[name_u]Joey[/name_u]
[name_u]Jay[/name_u]
[name_u]Sam[/name_u]
[name_u]Max[/name_u]
[name_m]Josh[/name_m]
[name_m]Levi[/name_m]
[name_m]Declan[/name_m] (Dec)
How about (sorry for any repeats):
Rory
Finn
Frederick ‘Fred’
Arki
Remy
Arlo
Dashiell ‘Dash’
Elio
Rafe
Otis
Finnegan ‘Finn’
Gabriel ‘Gabe’
Indigo ‘Indi’
Noah
Otto
Milo
Wilfred ‘Wilf’
Xavier ‘Xave’, Xavi’
Miro
Rafael ‘Rafi’, ‘Rafa’
Juno
Clementine ‘Clem’
Etta
Amma
Eleanor ‘Nell’
Adele ‘Dell’
Edie
India ‘Indi’
Maya
Juniper ‘Juni’
Eloise ‘Elle’
Nell
Lyra
Orla
Aurora ‘Rory’
Wilhelmina ‘Mina’
Zola
Henrietta ‘Etta’
June
Luna
Ines
My favourite sibset options would be:
Theo(dore), Jack, Otis (or Otto)
Theo(dore), Jack, Indi(go)
Theo(dore), Jack, Remy
Theo(dore), Jack, Rory
Theo(dore), Jack, Dash(iell)
Theo(dore), Jack, Edie
Theo(dore), Jack, Lyra
Theo(dore), Jack, Aurora (Rory)
Theo(dore), Jack, Henrietta (Etta)
Theo(dore), Jack, Nell (or Eleanor)
Hope this helps!
EDIT: not only have you said you’ve decided on Lucy but I’ve already responded to this post! That’s a lesson to me to read all the responses before I write my own… 
Lucy Adeline
Lucy Marigold
Lucy Primrose
Lucy Thea
Lucy Clementine
Lucy Eleanor
Lucy Violet
Lucy Stella
Lucy Matilda
Lucy Clara
Lucy Edith
Lucy Marlowe
Lucy Henrietta
Lucy Maeve
Lucy Seraphine
Good luck!
Thank you all so much! Now of course our front runner is [name_u]June[/name_u]! We still love [name_f]Lucy[/name_f] and also like [name_f]Charlotte[/name_f]. Any middle name suggestions for [name_u]June[/name_u]?
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June is gorgeous! It’s my daughter’s middle name 
I think it’s really lovely with [name_u]Theo[/name_u] and [name_m]Jack[/name_m]. [name_m]How[/name_m] about:
June [name_f]Marigold[/name_f]
[name_u]June[/name_u] [name_f]Beatrix[/name_f]
[name_u]June[/name_u] [name_f]Aveline[/name_f]
[name_u]June[/name_u] [name_f]Theodora[/name_f]
[name_u]June[/name_u] [name_f]Clementine[/name_f]
[name_u]June[/name_u] [name_f]Ophelia[/name_f]
[name_u]June[/name_u] [name_u]Marlowe[/name_u]
[name_u]June[/name_u] [name_f]Emmeline[/name_f]
[name_u]June[/name_u] [name_f]Amelie[/name_f]
[name_u]June[/name_u] [name_f]Persephone[/name_f]
[name_u]June[/name_u] [name_f]Tallulah[/name_f]
[name_u]June[/name_u] [name_f]Francesca[/name_f]
[name_u]June[/name_u] [name_f]Delilah[/name_f]
[name_u]June[/name_u] [name_f]Astrid[/name_f]
[name_u]June[/name_u] [name_f]Calliope[/name_f]
[name_u]June[/name_u] [name_f]Delphine[/name_f]
[name_u]June[/name_u] [name_f]Eleanor[/name_f]
[name_u]June[/name_u] [name_f]Matilda[/name_f]
[name_u]June[/name_u] [name_f]Seraphine[/name_f]
[name_u]June[/name_u] [name_f]Thea[/name_f]
[name_u]June[/name_u] [name_f]Margaux[/name_f]
[name_u]June[/name_u] [name_f]Penelope[/name_f]
[name_u]June[/name_u] [name_f]Estella[/name_f]
[name_u]June[/name_u] [name_f]Freya[/name_f]
[name_u]June[/name_u] [name_f]Violet[/name_f]
[name_u]June[/name_u] [name_f]Willa[/name_f]
[name_u]June[/name_u] [name_f]Allegra[/name_f]
[name_u]June[/name_u] [name_f]Frances[/name_f]
[name_u]June[/name_u] [name_f]Isobel[/name_f]
[name_u]June[/name_u] [name_f]Zelda[/name_f]
[name_u]June[/name_u] [name_f]Chiara[/name_f]