Posting on behalf of a friend.
We’ve specified on the name [name_f]Thea[/name_f] as either a first or middle name for our baby girl due [name_u]October[/name_u] as our honeymoon was in Kalithea (Greece).
[name_m]Can[/name_m] you please suggest names with [name_f]Thea[/name_f] as a first name and as a middle name to help us choose?
I adore [name_f]Thea[/name_f]! Congratulations on baby girl 
Without knowing if you prefer more unique or more classic or if you want to keep with the Greek theme or not, I’ll try to suggest a variety!
As a first name:
[name_f]Thea[/name_f] [name_f]Jayne[/name_f]
[name_f]Thea[/name_f] [name_u]Cleo[/name_u]
[name_f]Thea[/name_f] [name_f]Calliope[/name_f]
[name_f]Thea[/name_f] [name_f]Marigold[/name_f]
[name_f]Thea[/name_f] [name_f]Rasine[/name_f]
[name_f]Thea[/name_f] [name_f]Autumn[/name_f]
[name_f]Thea[/name_f] [name_f]Annette[/name_f]
[name_f]Thea[/name_f] [name_f]Carissa[/name_f]
[name_f]Thea[/name_f] [name_u]Shea[/name_u]
[name_f]Thea[/name_f] [name_f]Ingrid[/name_f]
[name_f]Thea[/name_f] [name_u]Quinn[/name_u]
[name_f]Thea[/name_f] [name_f]Elora[/name_f]
[name_f]Thea[/name_f] [name_f]Alondra[/name_f]
[name_f]Thea[/name_f] [name_f]Dawn[/name_f]
[name_f]Thea[/name_f] [name_u]Wren[/name_u]
[name_f]Thea[/name_f] [name_f]Lorraine[/name_f]
[name_f]Thea[/name_f] [name_f]Mabel[/name_f]
As a middle:
[name_f]Heather[/name_f] [name_f]Thea[/name_f]
[name_f]Grace[/name_f] [name_f]Thea[/name_f]
[name_u]Quincy[/name_u] [name_f]Thea[/name_f]
[name_f]Olwyn[/name_f] [name_f]Thea[/name_f]
[name_f]Hannelore[/name_f] [name_f]Thea[/name_f]
[name_f]Annaliese[/name_f] [name_f]Thea[/name_f]
[name_f]Evangeline[/name_f] [name_f]Thea[/name_f]
[name_f]Kinsley[/name_f] [name_f]Thea[/name_f]
I personally think it is stronger as a first name.
If you wanted a fall-themed pairing to go with the due date:
[name_f]Thea[/name_f] [name_u]Harvest[/name_u]
[name_f]Thea[/name_f] [name_u]Solstice[/name_u]
[name_f]Thea[/name_f] Cerridwen
[name_f]Thea[/name_f] [name_f]Scarlett[/name_f]
[name_f]Thea[/name_f] [name_f]Aurelia[/name_f]
[name_f]Thea[/name_f] [name_u]Hazel[/name_u]
[name_f]Thea[/name_f] [name_u]Ember[/name_u]
[name_f]Thea[/name_f] [name_u]Roux[/name_u]
[name_f]Thea[/name_f] [name_u]Sage[/name_u]
/
[name_f]Season[/name_f] [name_f]Thea[/name_f]
[name_u]Aspen[/name_u] [name_f]Thea[/name_f]
[name_u]Raven[/name_u] [name_f]Thea[/name_f]
[name_f]Hope[/name_f] this helps! 
I have a lot of favorites over the years, but [name_f]Thea[/name_f] is a favorite among favorites!
I primarily think of it and toy with is as a fn because the sound/flow seems to be better. Here are some combos I’ve made for fun:
[name_f]Thea[/name_f] [name_f]Minette[/name_f], [name_f]Thea[/name_f] [name_f]Pearl[/name_f], [name_f]Thea[/name_f] [name_u]Allison[/name_u], [name_f]Thea[/name_f] [name_f]Christine[/name_f], [name_f]Thea[/name_f] [name_f]Valerie[/name_f], [name_f]Thea[/name_f] [name_f]Charlotte[/name_f], [name_f]Thea[/name_f] [name_f]Melanie[/name_f], [name_f]Thea[/name_f] [name_f]Faye[/name_f], [name_f]Thea[/name_f] [name_f]Georgette[/name_f], [name_f]Thea[/name_f] [name_f]Yvette[/name_f], [name_f]Thea[/name_f] [name_f]Millicent[/name_f], [name_f]Thea[/name_f] [name_u]Vivian[/name_u], [name_f]Thea[/name_f] [name_u]June[/name_u], [name_f]Thea[/name_f] [name_m]Dresden[/name_m], [name_f]Thea[/name_f] [name_f]Caroline[/name_f], [name_f]Thea[/name_f] [name_f]Margaret[/name_f], [name_f]Thea[/name_f] [name_f]Frances[/name_f], [name_f]Thea[/name_f] [name_f]Cecile[/name_f], [name_f]Thea[/name_f] [name_m]Darwin[/name_m], [name_f]Thea[/name_f] [name_f]Jewel[/name_f], [name_f]Thea[/name_f] [name_f]Gretchen[/name_f], [name_f]Thea[/name_f] [name_f]Fleur[/name_f]
[name_f]Allene[/name_f] [name_f]Thea[/name_f], [name_f]Caroline[/name_f] [name_f]Thea[/name_f], [name_u]Mallory[/name_u] [name_f]Thea[/name_f], [name_u]Sparrow[/name_u] [name_f]Thea[/name_f], [name_f]Albertine[/name_f] [name_f]Thea[/name_f], [name_f]Nancy[/name_f] [name_f]Thea[/name_f], [name_f]Susanne[/name_f] [name_f]Thea[/name_f], [name_u]Fallon[/name_u] [name_f]Thea[/name_f], [name_f]Claudine[/name_f] [name_f]Thea[/name_f], [name_f]Lorraine[/name_f] [name_f]Thea[/name_f], [name_f]Carys[/name_f] [name_f]Thea[/name_f], [name_f]Annesley[/name_f] [name_f]Thea[/name_f], [name_f]Danielle[/name_f] [name_f]Thea[/name_f], [name_u]Larkin[/name_u] [name_f]Thea[/name_f], [name_u]Henley[/name_u] [name_f]Thea[/name_f], [name_f]Georgine[/name_f] [name_f]Thea[/name_f]
Here are some names - both for first and middle!
[name_f]Iris[/name_f]
[name_f]Sophie[/name_f]
[name_f]Helene[/name_f]
Parysatis
[name_f]Nelya[/name_f]
[name_f]Albane[/name_f]
[name_f]Eva[/name_f]
[name_f]Zoë[/name_f]
[name_f]Agnes[/name_f]
Hélénaīs
[name_u]Celeste[/name_u]
Roshanara
[name_f]Lucille[/name_f]
Herais
Laris(s)a
[name_f]Roxane[/name_f]
Pasiphaë
[name_f]Calliope[/name_f]
[name_f]Diana[/name_f]
[name_f]Juliette[/name_f]
[name_f]Clementine[/name_f]
[name_f]Daphne[/name_f]
[name_u]Calypso[/name_u]
[name_f]Lara[/name_f]
[name_f]Viviane[/name_f]
[name_f]Thalia[/name_f]
[name_f]Ines[/name_f]
Melinoē (Melinoë)
[name_f]Circe[/name_f]
Arsinoē (Arsinoë)
[name_f]Nora[/name_f]
[name_f]Clara[/name_f] / [name_f]Clarisse[/name_f]
[name_f]Josephine[/name_f]
[name_f]Luna[/name_f]
[name_f]Pauline[/name_f]
[name_f]Thea[/name_f] [name_f]Josette[/name_f]
[name_f]Thea[/name_f] [name_f]Calliope[/name_f]
[name_f]Thea[/name_f] [name_u]June[/name_u]
[name_f]Thea[/name_f] [name_f]Luella[/name_f]
[name_f]Thea[/name_f] [name_f]Ingrid[/name_f]
[name_f]Thea[/name_f] [name_f]Maeve[/name_f]
[name_f]Thea[/name_f] [name_f]Miriam[/name_f]
[name_f]Thea[/name_f] [name_f]Amelie[/name_f]
[name_f]Thea[/name_f] [name_f]Juliet[/name_f]
[name_f]Maren[/name_f] [name_f]Thea[/name_f]
[name_f]Penelope[/name_f] [name_f]Thea[/name_f]
[name_f]Caroline[/name_f] [name_f]Thea[/name_f]
[name_f]Vivienne[/name_f] [name_f]Thea[/name_f]
[name_f]Ingrid[/name_f] [name_f]Thea[/name_f]
[name_f]Alice[/name_f] [name_f]Thea[/name_f]
[name_f]Thea[/name_f] [name_f]Adelaide[/name_f]
[name_f]Thea[/name_f] [name_f]Claire[/name_f]
[name_f]Thea[/name_f] [name_f]Eloise[/name_f]
[name_f]Thea[/name_f] [name_f]Felicity[/name_f]
[name_f]Thea[/name_f] [name_f]Gwendolyn[/name_f]
[name_f]Thea[/name_f] [name_f]Josephine[/name_f]
[name_f]Thea[/name_f] [name_f]Lucille[/name_f]
[name_f]Thea[/name_f] [name_f]Paige[/name_f]
[name_f]Thea[/name_f] [name_u]Quinn[/name_u]
[name_f]Thea[/name_f] [name_u]Reese[/name_u]
[name_f]Thea[/name_f] [name_u]Rowan[/name_u]
[name_f]Thea[/name_f] [name_u]Whitney[/name_u]
[name_f]Lucy[/name_f] [name_f]Thea[/name_f]
[name_f]Norah[/name_f] [name_f]Thea[/name_f]