Ceynos.

Headword: 
Ceynos.
Principal English Translation: 

a Spanish surname; a famous figure with this name was the licenciado Francisco Ceynos, a judge and senior member of the Audiencia in New Spain who had the virtual power of a viceroy after the viceroy, Luis de Velasco (who was much more of a friend to indigenous people) had died

Camila Townsend, Annals of Native America: How the Nahuas of Colonial Mexico Kept Their History Alive (Oxford: Oxford University Press, 2016).

Attestations from sources in Spanish: 

Sabado a unze de dezi[embr]e 1568 a[ñ]os yquac momiquilli in tlatohuani Ceynos Sant Fran[cis]co callitic in quimotoquillique = Sábado a once de diciembre de 1568 años entonces murió el señor [tlatohuani] Ceynos, lo sepultaron en el interior del edificio de San Francisco. (ca. 1582, México)
Luis Reyes García, ¿Como te confundes? ¿Acaso no somos conquistados? Anales de Juan Bautista (Mexico: Centro de Investigaciones y Estudios Superiores en Antropología Social, Biblioteca Lorenzo Boturini Insigne y Nacional Basílica de Guadalupe, 2001), 176.