He has 2 sister's.
Grandson Karam Patel (Rapper Dirty Grim) , son of daughter Dimple Patel, was born on April 9, 1990.
Married to O.P.Ralhan's sister.
Films started coming his way when he played the role of a straight son of Nargis in Mother India.
Rajendra Kumars grandson Karam raps using the name Dirty Grim.