Tlaçopilli, chalchiuitl, maquiztli teuxiuitl, quetzalli tlaçotli, tlaçotitlacatl, xocoiutl, malhuiloni, tlamaluilli, chonequiztli, hatzoio, hateuhio, uel quiztica tepiltzin. = [He is like] a precious green stone, a bracelet of fine turquoise, a precious father. [He is] an esteemed noble, a youngest child—one who deserves to be treated with tenderness, with care. [ He is] a sensitive person, not unclean, not besmirched; a fortunate noble. (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 10 -- The People, No. 14, Part 11, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1961), 16.
plural = tlaçopipilitin
tlazopilli = precious prince (central Mexico, sixteenth century)
Thelma Sullivan, "Tlatoania and tlatocayotl in the Sahagún manuscripts," Estudios de Cultura Nahuatl 14 (1980), 225–238. See esp. p. 227.