David- An obituary of Rev. Mathias Marlay Kugler (b 28 Dec. 1848 d 13 May 1937) of Cincinnati states that he made trips to Gengenbach, the origin of his immigrant ancestor who is believed to be Johannes Kugler. Gengenbach is located in the southwestern corner of Germany. It is my understanding that Johannes Kugler's son Jacob spelled the name Koogler. Jacob married Kindla Harner and they are the ancestors of many of the Greene County, Ohio, Kooglers.