First of all, congratulations~
I wish your baby will grow up healthily!
I think a little girl named Ma should have a ladylike name. Therefore, Ya, Wen, Shi, Xian, Ying, Meng, Wan, Fang, Yi, Li, Ru, etc. are all good words.
Personally, you can name your daughter Ma Sixian, Ma Shiya, Ma Mengying
Ma Ruohan, Ma Yunwen, Ma Ying, Ma Ningshuang, etc.
A good name lasts a lifetime, and I hope your daughter can grow up healthily~