Spouse: Marijke Adriane den Boer (Married 27-Jan-1968)
Children: Leonard Tielenius Kruythoff, Willem Tielenius Kruythoff, Henrietta Maria Tielenius Kruythoff, Adolphine Jeanette Tielenius Kruythoff
Jacobus's Heritage
Parents: Leonard Tielenius Kruythoff, Hendrika Maria Udo
Siblings: