Native American names?

A little Native American boy says to his father one day< "Father, how do our people get their names?"

Father says, "my son, we have a long tradition of naming our babies according to what nature shows us. For example, when I was born there was a great eagle in the sky above our village, and that is why I am called Great Eagle. When your sister was born, I looked outside the lodge and saw a magnificent deer standing in the fied with her fawn, and so she was called Little Fawn. But why do you ask this now, Two Dogs Humping?"