Jean Stephenson writes in her book "Scotch-Irish Migration to South Carolina 1772" (I hope you don't mind me quoting you Jean):
"... it is often forgotten that prior to 150 years ago there was no standard for spelling; ours was a purely phonetic language.Words were spelled in any way that indicated to the writer the sound when spoken.This was complicated by the fact that the same letters, or combinations of letters, did not convey the same sound to all hearers." (especially if with a Scottish burr!!!)
She notes that my own surname McCreight could be spelt McCrate, and we know of McCrights and McRights.The origin of the name may be McCreath, which is one of the septs of the Scottish clan MacRae.
My 1st cousin, James McGrand, lives in Winchester, England and hence while posting on the McCreight Forum I looked up the name McGrand too.
Have a very happy holiday and a sucessful New Year.