House of Leiningen
Simon III's younger brother Friedrich III, "Frederick" (d. 1237), inherited the County of Leiningen, and founded "the younger House of Leiningen". His brother Heinrich (d. 1234) was a Bishop of Worms. They belonged to the House of Saarbrücken and related to the "Walramids" , descendants of Siegbert and Frederick, Count of Saarbrücken, who was the father-in-law of Frederick II, Duke of Swabia.