a person with six fingers on each hand (see Molina)
Orthographic Variants:
mapil chiquacen, mapil chicuacen
Alonso de Molina:
mapil chiquacen. hombre de seys dedos enlas manos. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 52r. col. 2. Thanks to Joe Campbell for providing the transcription.