No, I'm not descended from Jacob Treaster. Unfortunately, I have no other information regarding Jacob, except he appears to be an only child, or, at least, no other children are shown to Martin III and Catherine. I am a descendent of Martin Jr's brother Joh Michael Treaster, 1746-1826, 6th son of Hans Martin I, and of Joh's 5th son, George, 1780-1846, and his son (also)George,1818-1875, and his son Samuel, 1842-1912, and his son, Howard, my Grandfather, 1874-1953, and his son, my Dad, Grant, born in 1916 and still going strong, riding his bike every day. My Uncle, Rush Treaster, will celebrate his 90th birthday on May 13, and is going great. (Good genes!) Good luck with your search; this is fascinating stuff to explore. I am putting together a Web site, complete with the Treaster Coat of Arms. I'll post a link on this site when I have it ready -- within the next couple weeks. Best regards, Skip.