There are usually numerous ways of spelling first and surnames in genealogy records. Some are just abbreviations like Wm for William but could be transcription errors.
Especially in times of limited literacy it may be that the person recording events used their personal knowledge (bias) or even just spelt names as they ‘heard’ them.
We also have the myth that names were changed at Ellis Island which is dispelled in an article posted by the New York Public Library.
Below are just some of the examples come across in my tree research of how surnames may be spelt that either are definitely related or extremely plausible that come from the same root (family group).
There are likely to be more variants found at The Surname Society website along with the meanings of the names.
A’VARD
AVARD
ALGAR
ELGAR
ATWOOD
ATTWOOD
BAILEY
BAILLIE
BEAN
BEANE
BEATHAN
BEETHAM
BELCIE
BELSEY
BELSYRE
BOWELS
BOWLES
BOWLS
BRET
BRETT
BROUNE
BROWN
BROWNE
COCK
COCKS
COOK
COX
COLLIN
COLLINS
CRESSET
CRESSETT
DENN
DENNE
DENNY
DERRIAR
VERIER
VERRIER
VERYAR
VERYER
DEVERSON
DEVESON
DEVISON
DICKSON
DIXON
DONN
DUNN
DOUEY
DOVES
DOVEY
EASTES
ESTES
ESTYS
EMMES
EMMS
EMS
HEMMS
FACKLEY
FAKELEY
FAKLEY
FAKLY
FAGG
HAGG
FASSAM
FASSOM
FASSON
FERRER
FERRIER
FILE
FILES
FINNEES
FINNIS
GATTON
GATTEN
GAVAN
GAVIN
GILLIES
GILLIS
GOODHEW
GOODHEWE
GOODYER
GOODMAN
GOODMANS
GOOSEY
GOOZEY
GOWEN
MCGOWEN
GRICE
GRICH