itzcuauhtli.

a type of bird that was especially large, beautiful, and celebrated, as it would attack wild beasts and humans (according to Clavigero, v. 1, p. 44), and its neck, chest, and back feathers were golden, with wings and tail black (according to Sahagún); it is also called a Canadian eagle by naturalists
Francisco Plancarte y Navarrete, Prehistoria de México: obra postuma del Ilmo, 1923, 50.

as a personal name, itzcuauhtli would be rendered Itzcuauh (see the Matrícula de Huexotzinco); one Itzcuauhtzin was a ruler of the Tenanca Atlauhteca
Fernando Alvarado Tezozómoc, Crónica mexicáyotl, 1992, 47.