The name Monnie ranked 3618th in popularity for females of all ages in a sample of the 1990 US Census.
Though this name appears on the 1990 U.S. Census lists, it is used by only a small percentage of the general population.
This name might also be derived from either of two Latin sources: monere, meaning ''to advise,'' or nonnica, from the word for nun, nonna.
The most famous bearer of this name was Saint Monica, the mother of Saint Augustine. She prayed for her son and saved him from self-destruction. As a result, Saint Augustine became one of the greatest saints in history.