Juan Bautista de Pomar (died 1590) was an historian and writer interested in pre-Columbian Aztec matters after Mexico had been conquered by Spain. Based on mentions by Torquemada, we can estimate that he was born in 1535. He was the great grandson of the Tlatoani of Tlatelolco, and was half-Spanish on his father's side. He was considered noble by the Spaniards, and, after a dispute, he obtained one of the royal houses of Netzahualcoyolt of Texcoco.

He is credited with one of the most important compilations of Nahuatl poetry, "Romances de los señores de la Nueva España". Speaking Nahuatl as well as Spanish, he was raised as a Christian, and his writing was made up of a combination of Nahuatl and Latin characters.

His major work includes an account of the Aztecs and Tlatelolcas "Relación de Juan Bautista Pomar" completed in 1582. He found very old Native Americans, who recounted memory of the older and lost customs of their people. His account complements with the work of Bernardino de Sahagunand Alva Ixtlixochitl. He wrote his works by suggestions of the protomedic of Felipe II. There is also another account he wrote with the intention of claiming his rights to the legacy of Netzahualcoyolt.