Pedervet merch Pierre von Biron, dug Kourland, ha Dorothea von Medem (1761–1821), dugez Kourland, e oa Dorothea. Dispartiet e oa he zud, hag ur pried-kleiz he doa he mamm, Alexandre de Batowski, nonce polonat ha tad gwirion Dorothea, a greder, ganet e Friedrichsfelde, e-tal Berlin, e 1793.