During the occupation of Moldavia, Josias met Therese Stroffeck, a regular person. On September 24, 1789, in the town of Roman, she gave birth to a son. The son's name was Frederick. Josias married Therese after their return to Coburg, on December 24. He then said that he was the father of Frederick. Frederick was by the Austrian Emperor on August 25, 1808. On February 17, 1853 the Duke Ernst II of Saxe-Coburg-Gotha created him "Freiherr von Rohmann", named after the place of his birth. But Frederick, because he was born before his parents were married, did not inherit the duchy of Saxe-Coburg-Saalfeld.