The CSV files provide the datasets used in my research on two linguistic variables attested in Epigraphic Mayan (Mayan writing) during the Classic period (CE 200–900): 1) the H/J Merger, and 2) the weakening of the final velar fricative of the "male" proclitic ʔaj=. The work was presented at a couple of conferences and submitted for publication in the Journal of Historical Sociolinguistics.