I think your list is absolutely divine. Many of these are my favorites!
That said, the only ones that I could see with "Teen Mom" connections are Lacey and Liberty, and Kennedy but only with a tryndie spelling like Kynnedi. Deanna is borderline if it is pronounced Dee-ah-na, but Dean-a definitely does not have a "Teen Mom" feel.
I think it's a lovely list overall.
I agree with mge28. These names are Teen Mom or Toddlers and Tiaras.
The ones in bold are the ones that lean in that direction to me:
Audrey(Reminds me of Ashley, Brittany, Courtney... But the image of Audrey Hepburn makes it classier than that.)
Deanna(Don't know what to make of this. How do you pronounce it?)
Fallon(Reminds me of a pageant girl that I knew named Ferry.)
Kennedy (Feels like a fresher Courtney, again, a high school cheerleader name to me.)
Lacey (Same as Kennedy)
Liberty(Same as Kennedy. Names ending in Y feel trendier to me.)
Lyla(Popular a ending and short name that starts with L feels very "young to me". The y doesn't help.)
Morgan(Kind of like Morgan. An uni-sex name. Feels a little bit dated.)
Sienna(Feels very sweet and girly. I could imagine a little Tiara Toddler with this name.)
Stella(Same as Sienna.)
Deanna would be dee-ah-na or dee-anna, like the famous Canadian actress, Deanna Durbin :-) Thank you!
Originally Posted by peacebird10
Deanna is dee-ah-nah or dee-anna, it's after a Canadian 1940's+1950's film actress :)
Originally Posted by irmgard+theodorian
I think you're int he clear. Something being contemporary/popular doesn't automatically make it trashy or pathetic - Kennedy, Morgan, or Sienna are at the modern-est fringe, and they're all totally reasonable.
You mentioned your MIL giving you opinions. For your own sake, DO NOT TELL HER ANYTHING ELSE ABOUT YOUR NAMING DECISION PROCESS! Keep it between yourself and DH and anonymous strangers on the net!