The Navajo word tł’ízí refers to a goat in English.
In addition to sheep, some Navajo people keep goats. Goats are more inquisitive and daring than sheep, and also sometimes more aggressive.
They have mustaches.
There is a Navajo clan that is called Tł’ízí łání (like Kinłání), which means “Many Goats”. ‘Manygoats’ is a surname you’ll come across when meeting Navajo people.