‘Five Horses’ Is Her Name. What?

This is mythical and deep. Truly beautiful… 

A man asked an American Indian Chief what was his wife’s name. 

He replied, “She is called -Five Horses”-. 

The man said, “That’s an unusual name for your wife. 
What does it mean?” 

The Old Indian answered, 
“It old Indian Name. It mean… 

NAG, NAG, NAG, NAG, NAG!