Huehue Zaca or Zacatzin was a 15th century Aztec noble and a warrior who served as "tlacateccatl" ("captain general") under the ruler Moctezuma I. The name "Zaca" is probably derived from Nahuatl "zacatl", meaning "grass"; "-tzin" is an honorific or reverential suffix. "Huehue" is Nahuatl for "the elder", literally "old man". Zaca was the fourth child of ruler Huitzilihuitl. Wikipedia