Z

a personal name; there was a Zacancatl who was the lover or second husband of Cuauhcihuatzin
Dictionnaire de la langue nahuatl classique, citing W. Lehmann, 1938, 199; https://www.malinal.net/1.hist/Z.html

this could also be an ethnic affiliation, referring to a person from the pueblo or barrio of Zacanco

a place full of Bermuda grass

placing on straw (a ceremony or ritual)

Fray Bernardino de Sahagún, Primeros Memoriales, ed. Thelma D. Sullivan (Norman: University of Oklahoma Press, 1997), 79.

a basket of esparto

to take care of the tribute in grasses

Thomas Calvo, Eustaquio Celestino, Magdalena Gómez, Jean Meyer, and Ricardo Xochitemol, Xalisco la voz de un pueblo en el siglo XVI (Mexico: CIESAS/CEMCA, 1993), 60, 86.

the collection or harvesting of grasses

one who collects or harvests grasses

seems to be a ritual bib made from zacatl (or zacate in Mexican Spanish), meaning hay, straw, grass
Seen in the Matrícula de Huexotzinco, folio 790 recto, https://www.loc.gov/resource/gdcwdl.wdl_15282/?sp=654&st=image

the passing of straws (a ceremony)

Fray Bernardino de Sahagún, Primeros Memoriales, ed. Thelma D. Sullivan (Norman: University of Oklahoma Press, 1997), 73.