See an image that represents coyolli in the Visual Lexicon of Aztec Hieroglyphs, ed. Stephanie Wood (Eugene, Ore.: Wired Humanities, 2020-present).
cocoiochiuhqui in itequiuh melio = The small bell makers' tax is ½ tomín. (Coyoacan, mid-sixteenth cent.)
Beyond the Codices, eds. Arthur J.O. Anderson, Frances Berdan, and James Lockhart (Los Angeles: UCLA Latin American Center, 1976), Doc. 25, 142–143.
yoan icxic contlalia coiolli, teucujtlacocoiolli = And on her ankles she had placed bells -- golden bells. (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 2 -- The Ceremonies, no. 14, Part III, 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, 1951), 86.
auh njman ie ycoiol nenecoc, icxic in contlalitiuh, muchi teucujtlal in coiolli, mjtoa, oiooali: iehoatl inic xaxamacatiuh, ynic tzitzilicatiuh, ynic caquizti: yoan itzcac ocelenacace: yujn in muchichioaia, in iehoatl miquja ce xiujtl = And then they placed his bells on both legs, all golden bells, called oioalli. These, as he ran, went jingling and ringing. Thus they resounded, And he had princely sandals with ocelot skin ears. Thus was arrayed he who died after one year. (sixteenth century, Mexico City)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 2—The Ceremonies, No. 14, Part III, 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, 1951), 67.
Daniel Garrison Brinton says Aztec copper bells were tzilinilli, but other names for them were coyolli and yoyotli.
Daniel Garrison Brinton, Ancient Nahuatl Poetry: Containing the Nahuatl Text of XXVII Ancient Mexican Poems (1887), 25.