Spelling is of almost no relevance in surnames. My mother's maiden name of Stapleford is also spelled Stableford. My Grandfather always spelled it with the 'P' but his brother always used the 'b' and that was well into the 20th century. Dpn't forget that universal (almost) literacy is a very recent thing. In the past, even those who could read and write often used the skills very little and many people would spell phonetically. Witness how bad a lot of people's spelling is these days!

Love Lynne