Claiming descent from the legendary
Chichimec chieftains
King Xolotl and Nopaltzin, Ixtlixochitl became
tlatoani of Texcoco in 1409 after the death of his father,
Techotlala. For several years thereafter, Ixtlilxochitl continued to pay tribute to the powerful
Tepanec city of
Azcapotzalco and its
tlatoani Tezozomoc. However, Ixtlilxochitl grew restive in this role and, in preference to Tezozomoc's daughter, married the
Mexica princess Matlalcihuatzin, a daughter of
Huitzilihuitl,
tlatoani of
Tenochtitlan. In 1414, Ixtlilxochitl took the title
Chichimeca Tecuhtli ("Lord of the Chichimecs") and urged the
Mexica to ally with him against Azcapotzalco. However,
Huitzilihuitl, perhaps in deference to his wife, Tezozomoc's daughter, maintained his support of Tezozomoc and Azcapotzalco. ==Tezozomoc attacks==