The feminine form of ami is amie. The feminine plural is amies.
The feminine form of alumnus is alumna. The feminine plural is alumnae.
The feminine form of bajo is baja. The feminine plural is bajas.
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 charmant is charmante. The feminine plural is charmantes.
The feminine form for host is "hostess."
The feminine form of benefactor is benefactress.
The feminine form of "mauvais" is "mauvaise."
The masculine form of "duke" is "duke," and the feminine form is "duchess."
Ta means "your" before a feminine, singular noun.
Yes, Francoise is the feminine form of the name François.