Amelia & Sullivan + _________ ???

[Glm3026]

ISO the perfect sibling names for our third!
We have Amelia Louise (Millie) and Sullivan Jack (Sully) and I’m obsessing over finding the perfect name to go.
We won’t find out the gender so need options for both.
I’m British and my husband is from the US (also where we live). I love strong, traditional, and playful (but not too quirky) names. Our last name is short (one syllable) and begins with an M.

So far we have Penelope for a girl, and Spencer for a boy, but I’m not sold on Penelope and my husband isn’t sure about Spencer! Usually i wouldn’t say i love sibling names that are too matchy, but i love the thought of Millie, Sully and Spence 🤷🏻‍♀️

My immediate thoughts were:
Virginia (Ginny)
Tessa
Calliope (Callie)

Bennett (Ben)
Maxwell (Max)
Jonah

Vincent (Vinnie)

Vincent gets my vote too!

Sebastian nn Seb
Dominic
Silas
Dermot

Genevieve nn Gen
Gwendolyn nn Gwen
Clara
Sadie
Freya

Rafferty
Chester
Sidney
Nathaniel (Nate)
Tobias
Finnegan
Cassius
Zebedee
Dexter
Wilfred
Theodore

Cecily
Beatrix
Eliza
Harriet
Imogen

Madeleine (Maddy)
James (Jimmy)

Not keen on Spencer with Sullivan - same initials as well as surname style is a bit matchy for me, sorry. Mind you, Penelope's not really my taste either (although I like Amelia and Sullivan despite their popularity/surname feel).

I like the suggestion of Bennett and Maxwell if you like surname style. Or maybe Lewis (Louie), Thomson (Tommy), Finley (Finn), Harrison (Hal/Harry), Brody, Elliot, Fraser, Jensen etc. Also love suggestions of Nathaniel and Tobias (Toby).

For girls the suggestions of Harriet (Hattie) and Cecily (Cece) would work well imo. Or maybe Katherine (Kitty), Elizabeth (Libby/Elsie), Eleanor (Ellie/Nell), Caroline (Carrie), Charlotte (Lottie), Sarah (Sadie).