sentences:  In August 1125, Berengar is mentioned in documents of Henry's successor King Lothair II of Germany; his death is documented four months later.Gertrude married Conrad of Hohenstaufen, son of late Duke Frederick of Swabia, in 1136.While Conrad's elder brother Frederick II had succeeded their father as Duke of Swabia, he himself was elected German anti-king in 1127, but had to witness the coronation of his rival Lothair II as Holy Roman Emperor in 1133.