I think it's Marie Robinson who researches this name, Silvius. In the current issue of The Palatine Immigrant, there's a reference to a Johan Henrich Silvius, b. 1713 - d. bef Oct 1776. Any interest, get in touch with me and I'll give you the complete reference. (I've recently lost all my email and most of my address book, so am muddling around right now.) Marilyn