All Kretzschmars are supposed to be descended from the Bohemian family, above. In 1615, Johann Kretzschmar was Mayor of Breslau. His sons married into the houses of Flamischdorff, Borthendorff, von Seyslitz, von Veratt and others. The family was famous and renowned between 890 A.D. and 1700 A.D. Later, a few members went to Hagen, Westphalia. Some became admistrators of noblemen's estates, doctors, priests, iron smiths or woolen weavers.
The Kretchmer Coat of Arms is as follows:
"Blue: a gold heart, from which are leaving three gold thistles without leaves." There was no battle cry (motto) associated with the Kretchmer Coat of Arms.
(My dad has a small framed copy of the coat of arms).
*Breslau is now called Wroclaw