His father, Charles Trowbridge, was originally from Decatur, Illinois
and his mother, Katie Stephens, from Pachicca, Mexico. Jack was born in
Vera Cruz, Mexico, as was his brother, Charles Trowbridge.
His widow, Helen Trowbridge, died in 1976.
He and his wife were interred in a vault at the Grandview Memorial Park, in Glendale, California.