Nolan comes up on here fairly regularly, but I don't think it's that popular in real life. Mila has been gaining popularity since The Black Swan came out, but I don't think it's overly popular yet either.
I really like the name Mila, and do not consider it to be popular. In fact, I know no girls named Mila IRL. Nolan is gaining popularity IMO, but is not abundantly popular yet. I suppose it depends on how unique you're hoping the names will be.
I don't know where they rank popularity wise. I work with pregnant women and newborns however and I can't recall hearing either name off of this board. If you love them and the possibility of a name being popular doesn't bother you I don't think you should let it stop you from using either name.
I have only ever met one Nolan and one Mila. Nolan was not such a nice guy so the name is kind of eh for me, but Mila is such a cutie and the name is also adorable!
Re: Are these names too popular??
I here Nolan a lot on here, I have yet to meet one in real life.
I love Mila and rarely see it mentioned on here. Again, I don't know any in real life, so I think you're okay.
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Nolan is fairly popular in my area, and I have several fb friends who have recently used Nolan.
I only know one Mila IRL, and she is in her late 30's/early 40's (she's a second cousin of mine). I think its very pretty.
*BFP 10/15/11*CP 10/18/11*
*BFP 2/1/12*EDD 10/14/12*natural M/C 2/24/12 7w*
*BFP 5/2/12*E born 01/03/13 (her due date)
Ditto