He and his wife were interred in a vault at the Grandview Memorial Park, in Glendale, California.
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.
Was a World War I veteran.