Family
- father Robert Alda: Born in 1914 and died in 1986; best known for starring as George Gershwin in the biopic "Rhapsody in Blue" (1945) and for playing Nathan Detroit in the original 1950 Broadway production of "Guys and Dolls"; divorced from Alan's mother; later remarried to Flora Martino
- half-brother Antony Alda: Son of Robert Alda and Flora Martino; born in France; studied at Juilliard in NYC and at Notre Dame International in Rome; was a regular on NBC's "Days of Our Lives"
- daughter Elizabeth Alda: Mother, Arlene Alda; appeared in father's film, "The Four Seasons" (1981)
- daughter Beatrice Alda: Mother, Arlene Alda; appeared in father's films, "The Four Seasons" (1981) and "A New Life" (1988)
- step-mother Flora Martino: Married Robert Alda, after his divorce from his first wife
- daughter Eve Alda: Mother, Arlene Alda
- mother Joan Alda: Crowned Miss New York in a beauty pageant; battled with schizophrenia throughout her life; divorced from Alan's father
