Shortly after Lily was born (while still in the hospital) she earned a nickname.
When she was hungry she would try to eat everything her little mouth could reach; usually her blanket or her shirt. I decided that she was a goat - a "Lily Goat". Over two months later and the nickname still stands.
While I refer to her as "The Goat" or "Baby The Goat", Max prefers her proper name "Lily Goat". He will tell guests that "Lily Goat" is sleeping.
Phase one of the "render my daughter undateable plan" appears to be a success.