I automatically assumed you'd be Russian because of
Aleksandr, but nowadays many english-speaking people use it anyway, so I thought it'd be safer to ask. I love Russian names. I don't know if that's what you're looking for your babies, but I think they'd make a better sibset with
Aleksandr than using plain english names.
For boys, I really like Grigor(i),
Luka (nn Lukasha), Lukyan,
Matvey,
Pyotr (nn
Petya). For girls, I like
Aglaia,
Alina,
Ariadna,
Ekaterina (nn Katyuska or
Kitty),
Emilia,
Eva,
Evelina, Inessa, Jelena/Yelena,
Klara,
Lenora,
Lilia,
Viktoria, Ulyana. The spelling can, of course, vary according to your taste and transcription.
As sets, I particularly like
Grigor and
Emilia,
Grigor and
Klara,
Grigor and
Evelina,
Luka and
Eva,
Luka and
Ekaterina,
Luka and
Lilia, Lukyan and Ulyana, Lukyan and
Lenora,
Matvey and
Viktoria,
Matvey and
Emilia,
Matvey and
Eva,
Matvey and
Evelina,
Pyotr and
Ariadna,
Pyotr and
Klara.
Hope that was minimally helpful. And best wishes! :)