omichicahuaztli = bone rattle staff
Justyna Olko, Turquoise Diadems and Staffs of Office: Elite Costume and Insignia of Power in Aztec and Early Colonial Mexico (Warsaw: Polish Society for Latin American Studies and Centre for Studies on the Classical Tradition, University of Warsaw, 2005), 319.
ychicavaz yn imac ycac = in his [other] hand is his rattle staff
Fray Bernardino de Sahagún, Primeros Memoriales, ed. Thelma D. Sullivan, et al. (Norman: University of Oklahoma Press, 1997), 104.
yoan ychimal ietiuh, ymac mantiuh, ic momamantiuh: yoan ichicaoaz ietiuh, chicaoaçotiuh, qujtilquetztiuh in chicaoaztli, chachalaca, cacalaca = And he bore his shield, which went resting on his arm, and he carried his rattle stick, which he went rattling, and he proceeded planting his rattle stick on the ground, and it rattled and jingled. (16th century, Mexico City)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 2—The Ceremonies, No. 14, Part III, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1951), 45.