The Yagán people do not have an oral tradition about their origin, but they say that Watanuineiwa always existed because the celestial dome existed, only it was much closer to Earth than now.
In that time the women dominated them.
About their origin they tell the following legend:
In remote times many families arrived from the East. In company of that group the Yaolox family also arrived. The Yaolox brothers taught the other men how to use weapons and make tools. Simultaneously Lem arrived, the sun man and his Alainix brother, Rainbow and his wife Hanuxa, the moon woman. With their appearance they initiated a new form of existence, as if preparing the way for the coming of the real human beings, mankind.
The Yaolox were 3 brothers: two men and one woman. The youngest surpassed his older brother in all senses, and the woman Yaolox Tarnuxipa, was most intelligent of them all. The discovery of fire is attributed to the older brother.