Princess is the feminine form of prince (from Latin princeps, meaning principal citizen).
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 of benefactor is benefactress.
Ta means "your" before a feminine, singular noun.
Yes, Francoise is the feminine form of the name François.
Sarah means 'princess', the feminine form of prince. Prince in Sindarin (Elvish) is cund or cunn, and by adding a standard Elvish name ending (-iel,-ien, -wen), Sarah would be Cunniel, Cunnien, or Cundwen.
The feminine form of groom is bride. The female partner in a marriage.