John I, Count of Helfenstein
German count at Wiesensteig
(1287–1331)
Parents
Ulrich III, Count of Helfenstein
Adelheid von Graisbach
Children
Ulrich V, Count of Helfenstein
Siblings
Ulrich IV, Count of Helfenstein
Agnes von Helfenstein
Partners
Adelaide of Hohenlohe-Weikersheim