We have chosen [name]Lillian[/name] & [name]Violet[/name] for our twins’ name
but the problem is that we can’t think of pretty n.n for [name]Violet[/name]
What do you think can be pretty n.n for [name]Violet[/name]?
[name]Lettie[/name] is my favorite nn for [name]Violet[/name]. 
I know of a family that has three kids so far (one on the way, as well), and they are Questen (boy), [name]Violet[/name] ([name]Letty[/name]), and [name]Lillian[/name] ([name]Lilli[/name]). I think [name]Violet[/name] and [name]Lillian[/name] are sweet together!
I think [name]Vi[/name], [name]Vivi[/name], and even [name]Aya[/name] are cute nns for [name]Violet[/name]. [name]Aya[/name] isn’t as intuitive, but [name]Violet[/name] and [name]Ayelet[/name] sound kinda similar, and I like [name]Aya[/name] as a nn for [name]Ayelet[/name]. I think [name]Violet[/name], nn [name]Aya[/name], could work, although it is more of a stretch.
Good luck! I hope this helps!
[name]Lettie[/name] is my favorite, with [name]Vi[/name] (to rhyme with my) a close second. [name]Violet[/name]'s pretty short though, so I don’t think that it has to have a nickname.
My cousins daughter is named violet. We call her [name]Vi[/name] (rhymes with my) or [name]Vivi[/name] (again with the my sound)
I know a French [name]Violette[/name] who is called Vio (sounds like V.O.) which is very cute. For [name]Violette[/name] without the French accent I like [name]Vi[/name].
I love the suggestion of nicknames [name]Lettie[/name] and [name]Lily[/name]! I’ve also heard [name]Etta[/name], [name]Ivy[/name], [name]Vivie[/name], [name]Letta[/name], [name]Vi[/name] and [name]Ottie[/name] used.
My 3 year old is named [name]Violet[/name] and we call her V or Veo when we shorten it. I usually just call her [name]Violet[/name], though. Great names for the twins!
I like V or VV.