son / any male descendant / any direct descendant, male or female / Jr. (postnomial designator indicating a son with the same name as the father) / darling, dear (term of affection for a male beloved)

plural of fil

(Christianity) Son, person of the Holy Trinity

Male only child

a stepson, a son of the present spouse of its remarried parent / a son-in-law, the husband of one's daughter or son

grandson

plural of petit-fils

plural of beau-fils

plural of fils unique

prodigal son