It wasn't a case of mis-spelling the names...
The names are taken from whereabouts the people reside or their occupations.
For example, 'Blacksmith's' would have the the name Smith, Smyth, Black, Blackie, etc etc
Another example, would be risidinding at the bottom of a hill....Hill, Hilly, Hillie Bray etc etc
About 10 - 15 years ago, I done my family tree, because i was interested in doing something different...it is a costly thing to do, if sone properly...