Mintmaster in the Archbishopric Cologne during October 1502 to at least 1505, in the Zons Mint, jointly appointed with van
Leyden in the Deutz Mint. There is further reference in 1523 to a Johann Gronewalt in a delegation to Nürnberg, described
as the Cologne mintmaster; this is assumed to be the same person. Lit.: Alfred Noss, Die Münzen der Erzbischöfe von Cöln 1306-1547
(1913) pp. 263, 266, 318.