I'm still trying to find more history about my Hoagland side of the family. I can get back to the late 1700s but no connection to the "three brother" theory. I think that I broke the claim that all Houglands in America came from three bothers in 1645.
Yes, the Cozars and the number of spellings is large and they are all related. As well as they are related to the Ruple, Hougland, and Day.