a person who works the land, a villager (see Molina); literally, the "milpa is his/her home," someone whose home is among the cultivated fields
Orthographic Variants:
milla ychan
Alonso de Molina:
milla ychan. labrador o aldeano. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 56v. col. 1. Thanks to Joe Campbell for providing the transcription.