 The emigre historian Nicholas Baumgarten, however, pointed to the controversial record of the "Genealogia Welforum" and the "Historia Welforum Weingartensis" that one daughter of Count Kuno von Oenningen (future Duke Konrad of Swabia) by "filia Ottonis Magni imperatoris" (Otto the Great's daughter; possibly Rechlinda Otona [Regelindis], claimed by some as illegitimate daughter and by others legitimate, born from his first marriage with Edith of Wessex) married "rex Rugorum" (king of Russia).He interpreted this evidence as pertaining to Vladimir's last wife.It is believed that the only child of this alliance was Dobronega, or Maria, who married Casimir I of Poland between 1038 and 1042.