What is the meaning of Onza?

A traditional Spanish unit of mass, equivalent to about 28.76 g.

A cryptid in Mexican folklore said to be similar to a cougar or jaguarundi but especially aggressive.

English or American ounce, a unit of mass equivalent to 28.35 g

onza, Spanish ounce, a traditional unit of mass equivalent to about 28.76 g

English or American ounce (a unit of mass equivalent to 28.35 g or 31.1 g)

clipping of onza líquida, the English or American fluid ounce (a unit of liquid volume equivalent to 28.4 or 29.6 mL)

onza, Spanish ounce (a traditional unit of mass equivalent to about 28.76 g)

ounce (any large wild feline) (Can we verify this sense?)

cheetah (Acinonyx jubatus)

jaguarundi (Herpailurus yagouaroundi)

weasel (Mustela spp.)

jaguar (Panthera onca)

onza (cryptid feline in Mexican folklore)

Source: wiktionary.org