|King of Azcapotzalco|
|Reign||1367 or 1370–1426|
|Died||1426 (aged 105-106)|
Tezozomoc Yacateteltetl (also Tezozómoc, Tezozomoctli, Tezozomoctzin; 1320 – 1426), was a Tepanec leader who ruled the altepetl (ethnic state) of Azcapotzalco from the year 1353 or Five Reed (1367) or Eight Rabbit (1370) until his death in the year Twelve Rabbit (1426). Histories written down in the early colonial period portray Tezozomoc as a military and political genius who oversaw an expansion of Tepanec influence, bringing about Azcapotzalco's dominance in the Valley of Mexico and beyond.
Tezozomoc was a son of Acolnahuacatzin and Cuetlaxochitzin. He is described by Fernando de Alva Cortés Ixtlilxochitl as a tyrant and: "the most cruel man who ever lived, proud, warlike and domineering. And he was so old, according to what appears in the histories, and to what elderly princes have told me, that they carried him about like a child swathed in feathers and soft skins; they always took him out into the sun to warm him up, and at night he slept between two great braziers, and he never withdrew from their glow because he lacked natural heat. And he was very temperate in his eating and drinking and for this reason he lived so long."
He approved the choice of King Huitzilihuitl in 1403 and gave him his daughter Ayauhcihuatl in marriage, notwithstanding the opposition of his son Maxtla. He declared war against the king of Texcoco, Techotlalatzin, and being defeated sued for peace; but after the latter's death he continued the war against his successor, Ixtlilxochitl I, whom he defeated and assassinated in 1419, usurping the crown of Texcoco.
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- Tayatzin, who initially ruled after Tezozomoc's death but was later usurped by Maxtla.
With Tzihuacxochitzin I, he had:
- Icel Azcatl
- Aculnahuacatl Tzaqualcatl, who was installed as ruler of Tlacopan.
- Maxtla, who was installed as ruler of Coyoacán.
- Quaquapitzahuac, who was installed as ruler of Tlatelolco.
With other women, he had:
- Epcoatl, who was installed as ruler of Atlacuihuayan.
- Tzihuactlayahuallohuatzin, who was installed as ruler of Tiliuhcan.
- Ayauhcihuatl, married to Huitzilihuitl and had Chimalpopoca.
- Chimalpahin Cuauhtlehuanitzin, Domingo Francisco de San Antón Muñón (1997). Codex Chimalpahin: society and politics in Mexico Tenochtitlan, Tlatelolco, Texcoco, Culhuacan, and other Nahua altepetl in central Mexico: the Nahuatl and Spanish annals and accounts collected and recorded by don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin. The Civilization of the American Indian Series. edited and translated by Arthur J. O. Anderson and Susan Schroeder. Norman: University of Oklahoma Press. ISBN 0-8061-2921-2.
- The Aztecs, Nigel Davies.
| Tlatoani of Azcapotzalco