Jean Casimir Joseph Hubertus Janssen⁽¹⁾ was born⁽²⁾ about 1936. He died⁽³⁾ in 2005. He married⁽⁴⁾ Yvonne Coppes about 1965.
Yvonne Coppes was born about 1940. She died⁽¹⁾ in 2007. She married⁽²⁾ Jean Casimir Joseph Hubertus Janssen about 1965.