Okay, the name [name]Lark[/name] has been growing on me lately, and I have adored the name [name]Clara[/name] ever since I was about 7. And I was just wondering could you use [name]Lark[/name] as a nn for [name]Clara[/name]?
As someone who is called Dindlee from [name]Dina[/name], I say you could. Nn in my opinion can almost be anything you want.
I agree with dindlee. Nicknames do not always come from your given name. My husband calls my kids chicken fry sometimes & I have no clue why! LOL
I agree with the above posters. “[name]Lark[/name]” is in no way a diminutive form of [name]Clara[/name], but if you want to call your daughter [name]Lark[/name] as a pet name just because it’s cute, no one can criticize you for that.
I say go for it, a nickname can be whatever you want it to be.
I’ll add that [name]Clara[/name] [name]Lark[/name] is a nice combo if you wanted to use [name]Lark[/name] officially.
Yeah, nicknames do not always come from given names, but usually in that case, they are something random and cutesy/slightly embarrassing (like pp’s “Dindlee” and “Chicken Fry”). [name]Lark[/name] doesn’t fit that category, [name]IMO[/name]. Why not just use [name]Lark[/name] as a name? I like it much better than [name]Clara[/name] (too grandma-ish for my taste).
I think it could work. I’ve been considering using [name]Lise[/name] as a nn for myself, and I’m [name]Ashley[/name], haha, so I think you could get [name]Lark[/name] from [name]Clara[/name]! Especially if you use a “K” MN and pronounce [name]Clara[/name] like CLAR-ah as opposed to [name]CLARE[/name]-ah. I think something like [name]Clara[/name] [name]Katherine[/name], nn [name]Lark[/name], could definitely work.
I do agree with some of the others, though–I would use [name]Lark[/name] as a nn for really anything. Especially any “L” name. I had seriously considered [name]Liane[/name] nn [name]Lark[/name] at one point, haha. [name]Clara[/name] makes much more sense than [name]Liane[/name]!
My nickname has only one connection to my birthname, the M initial. [name]Lark[/name] for [name]Clara[/name] so works. 
[name]Love[/name] it! It’s a great idea, something like [name]Clara[/name] [name]Katherine[/name] nn [name]Lark[/name]