My 4x great grandmother, Harriet Buckingham, was originally married to a Lindsey Smith. She had a son with him, named Lindzey Smith. Why the spelling is different I don't know. Anyway, Lindsey Smith died and Harriet married Robert Feaviour, my 4x great grandfather.
They had one son, my 3x great grandfather Robert Linsey Feaviour. Once again, the name is spelled differently. He in turn had a son, named Robert Lindzey Feaviour. And then HE had a son named Lindsay Robert Feaviour! It seems they were determined to spell the name differently each time they used it. Just bizarre.