In-order of most likely to least likely.
Adults/Parents
MaMU Nohr - Nyx, Luna, Elise (maybe?)
MaMU Hoshido - Sakura, Hinoka
FeMU Nohr - Lazwald, Zero, Flannel, Marx, Leon
FeMU Hoshido - Nishiki
Children
MaMU Nohr - Ophelia , Foleo Apparently a guy? WOOOPS, guess Leon didn't mind his son at all., Soleil
MaMU Hoshido - Kinu, Matoi, Velor
FeMU Nohr - Soleil and Soleil is a girl , I seriously need to stop judging books by its cover.
FeMU Hoshido - Grey? I guess... that or no one.
Both - Parents
Felicia, Aqua, Joker, Suzukaze, Silas (maybe)
Both - Children
Zofie