(from the article `Genghis Khan`) ...they ravished Temüjin`s wife Börte. Temüjin felt able to appeal to Toghril, khan of the Kereit tribe, with whom Yesügei had had the relationship ... ...he skillfully used ancient customs: marriage alliances; putting himself under the patronage of a stronger prince; making an allia... Found on http://www.britannica.com/eb/a-z/a/70