Namesakes
Joannes of Cologne
(m) ?-1572 
Saints
Joannes van Oisterwijk
(m) ?-1572
Saints
Prudens van Duyse
(a.k.a. Joannes) (m) 1804-1859
Notable Writers
Charles of Mount Argus
(a.k.a. Joannes) (m) 1821-1893
Saints