[name_f]My[/name_f] SO is interested in feminine formal names with boyish nicknames.
[name_f]Francesca[/name_f] - [name_u]Frankie[/name_u]
[name_f]Louisa[/name_f] - [name_u]Lou[/name_u]
[name_f]Cordelia[/name_f] - [name_u]Cory[/name_u]
Any other suggestions?
Charlotte- [name_u]Charlie[/name_u]
[name_f]Florence[/name_f]- [name_u]Rory[/name_u]
[name_f]Josephine[/name_f]- [name_u]Joey[/name_u]
[name_u]Vivian[/name_u]- [name_m]Ian[/name_m]
[name_u]Atlas[/name_u] (unisex name imo)- [name_f]Attie[/name_f]
[name_f]Alexandra[/name_f]/Alexis - [name_u]Alex[/name_u]
Someone made a similar post recently, I’ll link it below with my responses 
Andromeda - Andy
Corinthia - Cori
Drucilla - Dru
Henrietta - Henri
Josephine - Joey
Olympia - Ollie
Willow - Will
Dahlia - Dally
Winifred “[name_u]Freddie[/name_u]” and [name_f]Georgiana[/name_f] “[name_u]Georgie[/name_u]” came to mind.
Bernadette - [name_u]Bernie[/name_u]
[name_f]Cleopatra[/name_f] - [name_u]Pat[/name_u]
[name_f]Crystal[/name_f] - [name_u]Chris[/name_u]
[name_f]Edwina[/name_f] - [name_m]Eddie[/name_m]
[name_f]Eleonara[/name_f] - [name_m]Leo[/name_m]
[name_u]Halle[/name_u] - [name_m]Hal[/name_m]
[name_f]Harriet[/name_f] - [name_u]Harry[/name_u]
[name_f]Lavinia[/name_f] - [name_u]Vinnie[/name_u]
[name_f]Lenora[/name_f] - [name_u]Lenny[/name_u]
[name_f]Martina[/name_f] - [name_u]Marty[/name_u]
[name_f]Matilda[/name_f] - [name_m]Matt[/name_m]
[name_f]Michayla[/name_f] - Mic, [name_u]Micky[/name_u]
[name_f]Winifred[/name_f] - [name_u]Freddy[/name_u]
Wilhelmina- [name_u]Billie[/name_u]
[name_f]Frances[/name_f]/Francine/Francesca- [name_u]Frankie[/name_u]
[name_f]Lauren[/name_f]- [name_u]Ren[/name_u]
[name_f]Anastasia[/name_f]- [name_m]Nash[/name_m]
[name_f]Daniella[/name_f]- [name_u]Dani[/name_u]
[name_f]Maxine[/name_f]- [name_u]Max[/name_u]
[name_f]Valentina[/name_f]- [name_u]Val[/name_u]
[name_f]Samantha[/name_f]- [name_u]Sam[/name_u]
[name_f]Rosemary[/name_f]- [name_u]Romy[/name_u]
[name_f]Mireya[/name_f]- [name_u]Rey[/name_u]
[name_f]Matilda[/name_f]- [name_u]Mat[/name_u](tie)
[name_f]Lorelei[/name_f]/Aurora- [name_u]Rory[/name_u]
[name_f]Carmella[/name_f]- [name_u]Mel[/name_u]
[name_f]Alessandra[/name_f]- [name_u]Sasha[/name_u]
[name_f]Aurelia[/name_f]- [name_u]Rey[/name_u]/Rae
[name_f]Augusta[/name_f]- [name_u]Gus[/name_u]
[name_u]Andrea[/name_u]- [name_u]Andy[/name_u]
[name_u]Antonia[/name_u]- [name_m]Anton[/name_m], [name_u]Toni[/name_u]
[name_f]Christina[/name_f]- [name_u]Chris[/name_u]
I love [name_f]Francesca[/name_f] ([name_u]Frankie[/name_u]).
Luella ([name_u]Lou[/name_u])
[name_f]Scarlett[/name_f] ([name_u]Scottie[/name_u]/Scout)
[name_f]Evangeline[/name_f] ([name_u]Evan[/name_u])
[name_f]Veronica[/name_f] ([name_u]Roni[/name_u])
[name_f]Annabel[/name_f]/Cassandra ([name_f]Andie[/name_f])
[name_f]Calliope[/name_f] ([name_u]Cal[/name_u])
[name_f]Danica[/name_f] ([name_u]Dani[/name_u])
[name_f]Georgia[/name_f]/Georgina ([name_u]Georgie[/name_u])
[name_f]Josephine[/name_f]/Joelle ([name_u]Joey[/name_u]/Jo)
[name_u]Kennedy[/name_u] ([name_m]Kenny[/name_m])
[name_f]Olive[/name_f] ([name_u]Ollie[/name_u])
[name_f]Persephone[/name_f] ([name_u]Percy[/name_u]/Perri)
[name_f]Maxine[/name_f] ([name_u]Max[/name_u])
[name_f]Camilla[/name_f] ([name_f]Cami[/name_f]/Cam)
[name_f]Edith[/name_f] ([name_m]Eddie[/name_m])
[name_f]Matilda[/name_f] ([name_m]Matt[/name_m]/Mattie)
[name_f]Stephanie[/name_f] ([name_u]Stevie[/name_u])
[name_f]Elena[/name_f] ([name_f]Leni[/name_f])
[name_f]Jacqueline[/name_f] ([name_m]Jac[/name_m])
[name_f]Gabrielle[/name_f] ([name_m]Gabe[/name_m])
[name_f]Michaela[/name_f] ([name_m]Mick[/name_m])
[name_f]Johanna[/name_f] ([name_u]Jonni[/name_u])
Maxime “[name_u]Max[/name_u]”
[name_f]Roxanne[/name_f] “[name_m]Rocky[/name_m]”
[name_f]Olivia[/name_f] “[name_u]Ollie[/name_u]”
[name_f]Veronica[/name_f] “[name_m]Ron[/name_m]”
Augustana “[name_m]Auggie[/name_m]” or “[name_u]Gus[/name_u]”
[name_f]Philomena[/name_f] “[name_u]Phil[/name_u]” or “Phin”
[name_u]Kendall[/name_u] “[name_m]Ken[/name_m]”
[name_f]Jessica[/name_f] “[name_u]Jess[/name_u]”
[name_f]Ericka[/name_f] “[name_f]Ricki[/name_f]”
[name_f]Natalia[/name_f] or [name_f]Natasha[/name_f] “[name_m]Nate[/name_m]”
[name_f]Eleanor[/name_f] or [name_f]Victoria[/name_f] “[name_u]Rory[/name_u]”
[name_f]Hermione[/name_f] “[name_u]Harry[/name_u]”
[name_u]Hillary[/name_u] “[name_m]Larry[/name_m]”
[name_f]Joanna[/name_f] “[name_m]Jonny[/name_m]” or “[name_u]Jo[/name_u]”
[name_f]Theresa[/name_f] “[name_u]Reese[/name_u]”
[name_f]Petra[/name_f] “[name_m]Pete[/name_m]”
[name_f]Bernadette[/name_f] “[name_u]Bernie[/name_u]” or “[name_m]Ben[/name_m]” or “[name_u]Bert[/name_u]”
[name_f]Elena[/name_f] “[name_u]Lenny[/name_u]”
[name_u]Evelyn[/name_u] or [name_u]Vivian[/name_u] “[name_u]Vinnie[/name_u]”
Veronica - [name_u]Roni[/name_u]/Ronnie
Alexandra, [name_f]Alexandria[/name_f], Alexandrite - [name_u]Alex[/name_u]/Andy
Evangeline/Evangelina - [name_u]Evan[/name_u]
Josephine - [name_u]Jo[/name_u]
Juliette - [name_u]Jett[/name_u]
Leonarda - [name_m]Leo[/name_m]
Aurora - [name_u]Rory[/name_u]
Georgia/Georgiana - [name_u]Georgie[/name_u]
Katherine - [name_u]Kit[/name_u]
Nicolette - [name_u]Nico[/name_u]
Theodora - [name_u]Theo[/name_u]
Jacqueline - [name_m]Jack[/name_m]
Miranda - [name_u]Andy[/name_u]
Persephone - [name_u]Percy[/name_u]
Wilhelmina - [name_m]Will[/name_m]/Billy
Margaret - [name_m]Rhett[/name_m]
I like [name_m]Otto[/name_m] as a nickname for [name_f]Octavia[/name_f].
Also
[name_f]Edwina[/name_f] nn [name_m]Eddie[/name_m]
[name_f]Regina[/name_f] nn [name_u]Reggie[/name_u]
[name_f]Maxine[/name_f] nn [name_u]Max[/name_u]
[name_f]Georgia[/name_f]/ [name_f]Georgina[/name_f]/ [name_f]Georgiana[/name_f] nn [name_u]Georgie[/name_u]
[name_f]Lucasta[/name_f] nn [name_u]Luca[/name_u]
[name_f]Winifred[/name_f] nn [name_u]Freddie[/name_u]/ [name_m]Fred[/name_m]
[name_f]Samantha[/name_f] nn [name_u]Sammy[/name_u]/ [name_u]Sammie[/name_u]/ [name_u]Sam[/name_u]
[name_f]Andromeda[/name_f] nn [name_u]Andy[/name_u]
[name_f]Michaela[/name_f] nn [name_m]Mackey[/name_m] or [name_m]Mikey[/name_m]
[name_f]Linnea[/name_f] nn [name_u]Lenny[/name_u] ([name_f]Leona[/name_f], [name_f]Leonora[/name_f], [name_f]Leanna[/name_f], and [name_f]Penelope[/name_f] could all get to [name_u]Lenny[/name_u] too.)
[name_f]Willa[/name_f]/ [name_f]Wilma[/name_f]/ [name_f]Wilhelmina[/name_f] nn [name_u]Billie[/name_u]
[name_f]Rachel[/name_f] nn [name_m]Archie[/name_m] ( I know a [name_f]Rachel[/name_f] who had this as her childhood nickname!)
[name_f]Matilda[/name_f] nn [name_u]Mattie[/name_u]/ [name_m]Matt[/name_m]
[name_f]Leona[/name_f]/ [name_f]Leonora[/name_f] nn [name_m]Leo[/name_m]
[name_f]Julia[/name_f]/ [name_u]Julie[/name_u]/ [name_f]Juliet[/name_f] nn [name_u]Jules[/name_u]
Maxine nn [name_u]Max[/name_u]
[name_f]Leonore[/name_f] nn [name_m]Leo[/name_m]
[name_f]Theodora[/name_f] nn [name_u]Teddy[/name_u] (or [name_u]Theo[/name_u])
[name_f]Juliet[/name_f] nn [name_u]Jules[/name_u]
[name_u]Willow[/name_u] nn [name_u]Willie[/name_u]
[name_f]Wilhelmina[/name_f] nn [name_u]Willie[/name_u] (or [name_u]Billie[/name_u])
[name_f]Regina[/name_f] nn [name_u]Reggie[/name_u]
[name_f]Rosemary[/name_f] nn [name_u]Rory[/name_u]
[name_f]Edwina[/name_f] nn [name_m]Eddie[/name_m]
Aurora "[name_u]Rory[/name_u]”
[name_f]Arielle[/name_f] “[name_u]Ari[/name_u]”
[name_f]Rebekah[/name_f] “[name_u]Beck[/name_u]”
[name_f]Adeline[/name_f] “[name_u]Dell[/name_u]”
[name_f]Avani[/name_f] “Vani”
[name_u]Camille[/name_u] - [name_f]Cami[/name_f]
[name_f]Charlotte[/name_f] - [name_f]Charli[/name_f]
[name_f]Eleanor[/name_f] “[name_u]Noor[/name_u], [name_u]Lenny[/name_u]”
[name_f]Elena[/name_f] “[name_u]Lenny[/name_u]”
[name_f]Florence[/name_f] “[name_u]Ren[/name_u]”
[name_f]Henrietta[/name_f] “[name_u]Henri[/name_u]”
[name_f]Henriette[/name_f] “[name_u]Henri[/name_u]”
[name_f]Harriet[/name_f] “[name_u]Harri[/name_u]”
[name_f]Josephine[/name_f] “[name_u]Jo[/name_u]”
[name_f]Lucinda[/name_f] “[name_u]Indy[/name_u]”
[name_f]Natalia[/name_f] “[name_u]Nat[/name_u]”
[name_f]Natalie[/name_f] “[name_u]Nat[/name_u]”
[name_f]Winslet[/name_f] “[name_u]Win[/name_u]”
[name_f]Basia[/name_f] “[name_m]Baz[/name_m]”
[name_f]Bastia[/name_f] “[name_m]Baz[/name_m]”
Flynore “[name_u]Flynn[/name_u]”
Astoria -[name_u]Rory[/name_u]
[name_f]Penelope[/name_f] -[name_u]Penn[/name_u]
[name_f]Ginevra[/name_f] -[name_u]Nev[/name_u]
[name_f]Madeleine[/name_f]-[name_u]Lennie[/name_u]
[name_f]Matilda[/name_f] -[name_u]Max[/name_u]
[name_f]Georgina[/name_f]-[name_u]Georgie[/name_u]
[name_f]Frederica[/name_f]-[name_u]Freddie[/name_u]
[name_f]Juliet[/name_f] - [name_u]Jett[/name_u]
[name_f]Isobel[/name_f]- [name_u]Bo[/name_u]
[name_f]Amabel[/name_f]-[name_m]Abe[/name_m]
[name_f]Amelie[/name_f] -[name_m]Ames[/name_m]
[name_f]Susannah[/name_f]-[name_u]Sunny[/name_u]
Ariana - [name_u]Ari[/name_u]
Casiopeia - [name_m]Cas[/name_m]
[name_f]Colinda[/name_f] - [name_m]Cole[/name_m]
[name_f]Filomena[/name_f] - [name_u]Finn[/name_u]
[name_f]Fredericka[/name_f] - [name_m]Fred[/name_m]/Rick
[name_f]Juliana[/name_f] - [name_u]Jules[/name_u]
[name_f]Leonora[/name_f] - [name_m]Leo[/name_m]
[name_f]Melissa[/name_f] - [name_u]Mel[/name_u]
[name_f]Nicole[/name_f] - [name_u]Nick[/name_u]
[name_f]Philippa[/name_f] - [name_u]Phil[/name_u]
[name_f]Roberta[/name_f] - [name_u]Robbie[/name_u]
[name_f]Willa[/name_f] - [name_m]Will[/name_m]
Wilhelmina - [name_u]Billie[/name_u]
[name_f]Aurora[/name_f] - [name_u]Rory[/name_u]
[name_f]Juliet[/name_f]/Julianne, etc - [name_u]Jules[/name_u]
[name_f]Eleanor[/name_f]/Helena - [name_u]Lennie[/name_u]
[name_f]Anastasia[/name_f]/Natalie/Natasha - [name_u]Nat[/name_u]
[name_u]Antonia[/name_u] - [name_u]Toni[/name_u]
[name_f]Josephine[/name_f] - [name_u]Jo[/name_u]
[name_f]Amelia[/name_f] - [name_u]Mel[/name_u]
[name_f]Geraldine[/name_f] - [name_u]Gerry[/name_u]
[name_f]Samantha[/name_f] - [name_u]Sam[/name_u]
[name_f]Jamila[/name_f] - [name_u]Jamie[/name_u]
[name_f]Emmanuella[/name_f] - [name_m]Manny[/name_m]
[name_f]Alexandra[/name_f] - [name_u]Alex[/name_u]
Antoinette nn [name_u]Tony[/name_u]
[name_f]Sybil[/name_f] nn [name_u]Billy[/name_u]
My favorite is [name_f]Marguerite[/name_f] nn [name_u]Max[/name_u]!
Lavinia “[name_u]Vinny[/name_u]”
[name_f]Martha[/name_f] “[name_u]Marty[/name_u]”
[name_f]Leonora[/name_f] “[name_m]Leo[/name_m]”
Olivia/Olive: [name_u]Ollie[/name_u]
[name_f]Colette[/name_f]: [name_m]Cole[/name_m]
[name_f]Rebecca[/name_f]: [name_u]Beck[/name_u]
[name_u]Eden[/name_u]: [name_f]Edie[/name_f]
[name_f]Aurelia[/name_f]: [name_u]Rey[/name_u]
[name_f]Danielle[/name_f]: [name_u]Danny[/name_u]
[name_f]Henrietta[/name_f]: [name_m]Henry[/name_m]
[name_f]Josephine[/name_f]: [name_m]Joe[/name_m]/Joey
[name_f]Luciana[/name_f]: [name_u]Lou[/name_u]/Luca
[name_f]Jessica[/name_f]: [name_u]Jess[/name_u]
[name_f]Aleksandra[/name_f]: [name_u]Sasha[/name_u], [name_u]Alex[/name_u], [name_u]Andy[/name_u]