Sibling of Isabelle and Sebastien?

[notbarry]

We live in UK but DH is French and we have vague plans to move there in the future, so names need to work in both languages. We both prefer more classic names. Currently the thinking is Vincent (DH is a bit :/ and the two pronunciations are very different) or Marie (I don't like it at all but it was DH's grandmother's name and he loves it). Thank you!

Vincent is gorgeous.

I'd go with Marianne if DH is keen on the Marie element. Beautiful name and IIRC the name of the female personification of France!

Or friends of mine called their DS Lucas, pron "Luca" by her French half of the family.

Jules
Margaux
Sophie
Tom / Thomas
Maxime (Shortened to Max in English)
Camille
Pierre
Gustave

Just reading the title, the name that jumped in to my head was Felicity.

Dorothy (Seb , Izzy and Dot)
Gideon

Madeleine
Christian

Elodie or Lucas "Luc"

Henry/Henri

Celeste

Eric / Erica popped into my head when I read the OP. No idea why.
Elena, Amelie,
Ernest, Christophe
Otherwise Vincent is lovely.

Marietta
Jaques

Isabelle, Sebastien and...

Emma
Camille
Clara
Juliette
Lucie
Nina
Rose
Margot
Emilie
Anna
Eloise
Clementine
Amelie
Lilia
Clarisse
Sophie
Celeste
Elodie

Louis
Raphael
Victor
Tristan
Marius
Florian
Oscar
Lucas
Roman
Felix
Arthur
Daniel
Christian
Frederic
Nicolas
Pascal
Theodore
Yannick
Thomas

Clémence
Marine
Aurélie
Léa

A half-French girl I know is called Elise, which I think is pretty. Also Eloise. Marie would work well as a middle name with practically anything so maybe you could convince your DH to go with that if you have a daughter.

Xavier
Florence
Louis (with a silent s. if you want to hear the s it's Lewis!)
Lysander
Vianne
Vivienne

Also like Elodie and Clementine already mentioned.

Sorry, hit post too soon!

Clémence
Marine
Aurélie
Léa
Camille

Matthieu
Arthur
Nicolas (Nico for nn)
Felix
Roman

Belle and Sebastian needs an indie name to accompany them - although I've drawn a blank

You have a Belle and Sebastian!!!
That's fab!!!

en.m.wikipedia.org/wiki/Belle_and_Sebastian_(French_TV_series)

Marielle
Sylvie
Cleo

Tristram
Oscar
Christian

I like Vincent and Marie. Other thoughts...

Ottilie
Aurelie
Valentine
Elodea

Joachim
Leopold
Milo
Roman

Aurélie is just beautiful
Isabelle and Aurélie
(Marianne as middle name)
Boys' names I love Raphaël

Isabelle, Sébastien et Raphaël
Sébastien, Isabelle et Aurélie

^ I also love Rafi/Raphi as a nickname

^ I also love Rafi/Raphi as a nickname

Love it so much I said it twice!

Also English with a French DH. Some of the names on our list for DD2 which I think might fit:

Charlotte
Mathilde/Matilda
Audrey
Elise
Olivia

Raphael/Rafael
Noah
Alexander
Daniel
Joseph

Gabriel

Florence
Adeline
Emmanuelle