uecauhcayotl. antiguedad o vejez. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 155v. col. 1. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
HUEHCĀUHCĀYŌ-TL old age, antiquity; ancestor / antigüedad o vejez (M), antecesor, ancestro (Z) [(2)Zp.11,155]. See HUEHCĀHU(A), -YŌ. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 83.