The feminine form of the title (or name) Don, is Donna. The title is used to describe a female Don (boss) of the Italian Mafia.
Donna
The feminine form of alumnus is alumna. The feminine plural is alumnae.
The feminine form of ami is amie. The feminine plural is amies.
Mistress is the feminine form of master. It is already in feminine form.
The feminine form of a baron is a baroness.
The feminine form of bajo is baja. The feminine plural is bajas.
The feminine form of charmant is charmante. The feminine plural is charmantes.
The feminine form of benefactor is benefactress.
"The woman" is an English equivalent of the Italian name Ladonna. The feminine singular surname in question represents a merger of the feminine singular definite article la ("the") and the feminine singular noun donna("woman") to form a last name. The pronunciation will be "la DON-na" in Italian.
The feminine form of groom is bride. The female partner in a marriage.
The feminine form of the name Ronald is Ronaldine.
The feminine form of the word "count" is "countess."