Greg Calvert was born in 1937.
I would say that is completely opinion.
Irene Calvert died in 2000.
Calvert Jones died in 1877.
Calvert Pratt died in 1963.
Frank Calvert died in 1908.
Steve Calvert died in 1991.
Leonard Calvert died in 1647.
Elizabeth Calvert died in 1788.
Calvert Yates died in 1904.
Calvert Magruder died in 1968.
Calvert Vaux died on 1895-11-19.