My maternal grandfathers surname is Hutchison. I have been researching that side of the family tree. Thus far, all the documents (etc) I have found are consistent with my maternal grandfathers surname. However, everything beyond my 2nd great-grandfather show the last name (including census and marriage records) shows Hutchinson. Is this a common happening? I'm not sure if maybe the name got changed through time or maybe I have made a mistake somewhere. Any help given would be much appreciated. Thank you in advance!