I absolutely love
Sonya. I'm a bit torn on the spelling as well, but in this case I'd go with
Sonya, since we're talking russian spelling. I'd see
Sonja more suitable in a Germanic language and
Sonia in Italian, Spanish and so on.
I'm not a huge fan of
Sasha. I don't particularly like it, plus the fact that it's a nn (I know
Sonya is one as well)... For some reason I just can't seem to warm to it as a full name.
I like
Sveta. I'd pronounce it Sveh-tah.
Out of your sibets I'd go for
Sonya and
Anya, as I adore
Anya as well. I knew a sibset once
Tanya and
Sonya. I loved it back then as well. I think the -nya names sound great.
As for middle names...
Sonya NathaliaSonya LouiseSonya MarieSonya SkyeSonya LeanneSonya ElizabethSonya SageSonya Cathleen
Sveta AlisaSveta AnastasiaSveta TheodoraSveta KatarinaSveta Marina
as for
Anya my usual combo for it, is
Anya Celine but I'm also thinking
Anya CelesteAnya SophieAnya ClaireAnya Marguerite
If I were to choose I'd go for
Sonya Sage and
Anya Celeste.
Lea