I am descended according to a book on my Rudulph lineage from a princess Anna Rudulph (1740 -1745) who was an half-niece of Frederick Wilhelm I of Prussia and who came to the U.S.A. (but died in France) with her husband Wilhelm's dashing captain Michael Johannes Rudulph who was born near the Rhine in Prussia and who died in U.S.A. 8/20/1741. My mother and I are trying to determine Anna's ancestry.