Surnames beginning with SI

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SIA SIB SIC SID SIE SIF SIG SIH SII SIJ SIK SIL SIM SIN SIO SIP SIQ SIR SIS SIT SIU SIV SIW SIX SIY SIZ

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.