The names Hendrix and Hendricks are the same family. I grew up with part of the Hendricks family around Henderson, Texas. Prudence "Prudy" Bethany Maxwell who married John Henry Hendricks is my great grand aunt.
I am descended from Robert W. and Bethany Talbot Maxwell. They are my great great grandparents. My great grandmother is Elizabeth Maxwell who married John W. Green. I am in contact with a cousin who is researching information that Joel is the father of Robert Maxwell and Rev. Thomas Maxwell is Joel's father. My cousin is descended from James Knox Polk Maxwell, brother of Elizabeth. J. K. P. Maxwell married Lucy Estes. Elizabeth died in childbirth when my grandmother was born. Daddy knew Uncle Jim and Aunt Lucy.
I believe the Maxwells came from Scotland but have no proof. There is a Scottish Clan Maxwell. Any Maxwell or descendant of the Maxwells can join Clan Maxwell.