GRANDFATHER - John Mason. Merchant.
GRANDMOTHER - Mabel Mason.
GRANDFATHER - Isadore Ostrer. Wool manufacturer. Died 1975; Mason inherited a seat on the board of the family-owned Illingworth, Morris Company, wool manufacturing company.
FATHER - James Mason. Actor. Born May 15, 1909; died July 27, 1984; popular English matinee idol of the 1940s who later went to Hollywood and was at his best in offbeat, moody roles; notable films include "The Man in Grey" (1943), "The Seventh Veil" (1945), "Odd Man Out" (1947), "20,000 Leagues Under the Sea" and "A Star Is Born" (both 1954), "Lolita" (1962), "Georgy Girl" (1966) and "The Verdict" (1982).
MOTHER - Pamela Mason. Actor, author, columnist, TV hostess. Born March 10, 1916, daughter of producer Maurice Ostrer; formerly married to actor Roy Kellino; wed James Mason 1941, divorced 1964; died 1996.
SISTER - Portland Mason. Author, actor. Born 1948.