one who shakes or sifts something; perhaps one who brushes off clothing (?) (see Molina and related terms)
IPAspelling:
tɬɑtsehtseloɑːni
Alonso de Molina:
tlatzetzeloani. el que cierne algo, o el que sacude la ropa. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 142v. col. 2. Thanks to Joe Campbell for providing the transcription.