Surnames beginning with BY

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BYA BYB BYC BYD BYE BYF BYG BYH BYI BYJ BYK BYL BYM BYN BYO BYR BYS BYT BYU BYW BYZ

Surnames shown in bold text represent around 90% of the population of Great Britain. All other names are very uncommon in the UK and we are unlikely to have any useful data on them.