There are several different spellings for the Newcombe surname, Mostly:
NEWCOMBE, NEWCOMEN, NEWCOME, NEWCOMB, NEUCOME, NUCOME, NEWCUM
Within family groups each child could have a slightly different spelling of the name, Often dependent on who and where it was written. To simplify the Database, All derivatives of the surname is entered simply as NEWCOMBE. I know it might sound biased towards how it is spelled here in South Africa, but it is also how many other Genealogy pages group the surname too.
Also where ever possible I've tried to keep references to the persons in the notes with the original spelling.