Complex sentence: Among these was the Jewish Christian missionary Joseph Wolff, whom Alexander met at his estate of Khosrova and for whom he was a source of information about the genealogy of the Bagrationi dynasty, including a claim of descent from David, and the Jews of Georgia.
Split into simpler sentences: Among these was the Jewish Christian missionary Joseph Wolff, whom Alexander met at his estate of Khosrova. The prince served to Wolff as a source of information about the genealogy of the Bagrationi dynasty, including a claim of descent from David, and the Jews of Georgia.