Guzmán.

(a loanword from Spanish)

Headword: 
Guzmán.
Principal English Translation: 

a Spanish surname; also the name taken by indigenous people; e.g. don Juan de Guzmán and his son don Felipe de Guzmán, "rulers and members of the royal dynasty" of Coyoacan; the noblewoman doña Agustina de Guzmán was another important figure in this family, and she was married for a time to don Constantino Chacalin, a ruler from Michoacán

(central Mexico, 1614)
see Annals of His Time: Don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin, James Lockhart, Susan Schroeder, and Doris Namala, eds. and transl. (Stanford: Stanford University Press, 2006), 282–283.

Orthographic Variants: 
Cosman
Attestations from sources in English: 

yhuerta catca in cuyohuacan tlahtohuani catca Don Juan de guzman itzllolinqui, ye ipilhuan ixhuihuan yn oquinnamaquiltico huerta yn omoteneuhtzinoque teupixque yn oncan incolegiotzin quimochihuilique yc motlatocamaquilique San Angel Martyr. yn oncã quimomachtitzinohua latin telpopuchtin teupixque = the late ruler in Coyoacan don Juan de Guzmán Itztlolinqui; his children and grandchildren sold the orchard to the said friars. They built their colegio there, giving it the name of San Angel Mártir, where they teach Latin to young ecclesiastics (central Mexico, 1615)
Annals of His Time: Don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin, James Lockhart, Susan Schroeder, and Doris Namala, eds. and transl. (Stanford: Stanford University Press, 2006), 302–3.

no yquac miqui Don Diego de cosman = Also at this time don Diego de Guzmán [died] (entry for 1554)
Here in This Year: Seventeenth-Century Nahuatl Annals of the Tlaxcala-Puebla Valley, ed. and transl. Camilla Townsend, with an essay by James Lockhart (Stanford: Stanford University Press, 2010), 164–164.

Don Esteban de Guzmán is said to have been a governor of Mexico City, ca. 1536–1565. He appears on the Codex Reese (ca. 1565) that is held in the Beinecke Library at Yale University.
See the library's webpage about the codex. https://brbl-dl.library.yale.edu/vufind/Record/3600017?image_id=1114791