One of the places I saw Bowdewine listed was
http://wc.rootsweb.ancestry.com/I am researching the Coykendalls who were in/near Emmet county, Michigan.
Cyrus Andrew Jackson Coykendall, son of Bowdewine. I believe that Cyrus also had a son named Bowdewine.
Variations of the surname that I have come across so far are Coykendell/Kuykendell/Kuykendall.
My Coykendall married into the Rutledge of upper Michigan/possibly Canada. I have always heard that both sides came from Canada at some point, but I have not found the connection yet.