[name_m]Welcome[/name_m] to Nameberry, and congratulations on little miss! 
[name_f]Lottie[/name_f] is absolutely darling, as well! [name_m]Great[/name_m] choice, mama!
All your options are beautiful! In general, [name_f]Isabelle[/name_f] is my favorite of the four names you’re considering adding, but I think I like Lottie-Amelia best? [name_f]She[/name_f] is so lovely! Here’s a few additional ideas:
Lottie-Grey
Lottie-Joy (possibly my favorite? I adore Joy!)
Lottie-Snow
Lottie-Pearl
Lottie-Lucille
Lottie-Maeve
Lottie-June
Lottie-Eve
Lottie-Camille
Lottie-Sophia
Good luck!