Andrés de Olmos

Andrés de Olmos (c.1485 – 8 October 1571) was a Spanish Franciscan priest and grammarian and ethno-historian of Mexico's indigenous languages and peoples.

As early as 1533, Olmos was recognized as unusually adept in the Nahuatl language and well-informed about the history and customs of the Nahuatl-speaking peoples.

Olmos wrote a book, now lost, about the pre-Hispanic history, beliefs and religious practices of Mexico (some have suggested that this work might be the mysterious Crónica X).

He also published a collection of Huehuetlahtolli, moral instruction from Nahuatl-speaking elders to their juniors, expressed in a highly stylized and polished, high-register language.

Although it was based on his own and others' previously written notes about Classical Nahuatl grammar, this was the first relatively complete grammatical description of an indigenous language of the New World.