Chris, I have now read the Alleman genealogy book at the Allen Co. Library. I only found 1 reference to Dorstius..."Dorstius and Peter arrived in 1752".They were thought to be Huguenot origin, and immigrated to PA, to Lancaster Co., now Dauphin Co. The book is abt 90 pps. and has lots of bloodlines butmostly discusses the lines of John Christian, John Fredrick Christian and Hiram , brothers who arrived on ship LEATHLEY,to Philly, PA, arrived 9/19/1753. If any of this is useful, I can fax it to you., abt 46 double pages.