The county coroner's office says the death was reported as due to natural causes but an autopsy is planned.
Robert was also the grandson of legendary jazz singer Nat King Cole, and an accomplished drummer in his own right who worked in the music industry.
A year and a half after the sudden death of the singer Nicole Cole at the age of 65 years, occurred on December 31, 2015 following a heart failure, his only son, Robert Yancy passed away at his tower.
According to the Daily Mail, Robert Yancy was found dead inside his San Fernando Valley apartment on Monday by a friend who was concerned about the fact that he had not heard from the young man for a few days.
It was made clear to the family that drugs, which Robert never used, were not involved in his death.
Natalie Cole and Marvin Yancy were married from 1976 to 1980. "We will find solace in her legacy as well as her endless fans around the world".
Yancy became pastor of the Fountain of Life Baptist Church after the death of his father in 1977.