Vera - "VEER-uh"
Viola - "VIE-uh-lah"/"VIE-luh" (somewhere between the two).
Linnea - "lin-NAY-uh".
I like them all, actually, but especially
Viola and
Linnea (they would be great for siblings!). Not so keen on
Lola, it's a bit of a push for
Viola.
Viola doesn't demand a nickname, I think - if anything I would call her Vy for short.
Sometimes sentences don't end the way you think they salad.