The styles fit very well together.
I prefer Esmée for a girl, since Esmé is grammatically masculine in French to my understanding and was originally borne by a male (Esmé Stuart/Stewart, 1st
Duke of
Lennox, 1542/3-1583). I've never liked
Freya, but besides thinking the name bears a passing similarity to "fryer" and "frying" I don't really know why; as a middle name, I can pass it.
Brothers?
Ludovic,
Quintin (KWIN-tin),
Quentin (KWEN-tin),
Quincy,
Victor,
Jonas,
Crispin,
Odo,
Kenelm,
Everett,
Cassius (KAS-ee-us),
Marcel, and
Marius come to mind. Any name that sounds artsy and aristrocratic Victorian would fit in well, I think.