If you are talking about the son of Pernell Roberts, then it appears he died in a motorcycle accident in 1989.
Jonathan Satter was born in 1969.
Jonathan Kariara was born in 1935.
Evan Roberts - botanist - was born in 1909.
George Quinlan Roberts was born in 1860.
Jonathan Roberts was born on May 10, 1956.
Jonathan M. Roberts was born in 1821.
Michael Roberts - writer - was born in 1902.
Gareth Roberts - writer - was born in 1968.
Samuel Roberts - writer - was born in 1800.
Walter Roberts - writer - was born in 1916.
Jonathan Roberts was born on May 10, 1956.
Jonathan Penner - writer - was born in 1941.
Jonathan Green - medical writer - was born in 1788.
Jonathan Shipley - writer - was born on 1951-09-28.
Irene Mecchi, Jonathan Roberts, and Linda Woolverton are the credited screenwriters for the movie.
Jonathan M. Roberts died in 1888.