In English there are no masculine or feminine forms. English uses gender specific nouns for male or female.
The gender specific noun for the husband of your daughter is son-in-law.
The gender specific noun for the wife of your son is daughter-in-law.
daughter-in-law
Daughter -in-law
Daughter-in-law
Daughter-in-law
The feminine form of charmant is charmante. The feminine plural is charmantes.
The feminine form of benefactor is benefactress.
Tragedienne
A stallion is a male horse that has not been neutered so he is capable of impregnating a female horse. The feminine form of stallion is a mare.
Alumni is the plural of alumnus; the feminine form alumni is alumnae. The feminine form of alumnus is alumna.
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 alumnus is alumna. The feminine plural is alumnae.
The feminine form of charmant is charmante. The feminine plural is charmantes.
The feminine form of bajo is baja. The feminine plural is bajas.
The feminine form of benefactor is benefactress.
Kill him or....... I'm sorry but that's all you can do!
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 Duke is Duchess.
The feminine form of grandfather is grandmother.