http://www.st-otger.de/kirchen-personen/verwaltung/pfarrbuero/ can supply the marriage entry giving details of the couple's parents and their ages at marriage. There is no proof that Joannes Philipp Weyer was a son of Leopold Philipp von Ebersberg genannt von Weyers. https://books.google.co.uk/books?id=_b5DAAAAcAAJ&pg=PA271&l... tells us that the male line became extinct.