Mieszko II Lambert
In 1199, King Ottokar divorced Adelaide, officially on the grounds of consanguinity. They were both descendants of Margrave Henry of Schweinfurt and the Polish king Mieszko II Lambert. They were fifth cousins once removed or fourth cousins once removed. Ottokar married Princess Constance of Hungary, daughter of King Béla III, who was his fourth cousin thrice removed, later in the same year.