Principal English Translation:
a deity relating to fire; this "Yellow Face" was more commonly called Xiuhteuctli (or Xiuhtecuhtli), "Turquoise Lord," and Huehueteotl, "Old God"
Fray Bernardino de Sahagún, Primeros Memoriales, ed. Thelma D. Sullivan, et al. (Norman: University of Oklahoma Press, 1997), 100.
"Yellow Face" was part of the Xiuhtecuhtli Complex of deities, associated with fire and paternalism
"Table 3. Major Deities of the Late Pre-Hispanic Central Mexican Nahua-Speaking Communities." Handbook of Middle American Indians, Volume 6: Social Anthropology, ed Manning Nash (Austin: University of Texas Press, 1967).
Attestations from sources in English:
An important deity, propitiated particularly during the veintena of Izcalli, he was considered to be the patriarch of the pantheon and the archetype of the rulers in their paternalisitc role.
Fray Bernardino de Sahagún, Primeros Memoriales, ed. Thelma D. Sullivan, et al. (Norman: University of Oklahoma Press, 1997), 100.