Surnames beginning with OKA

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OKAB OKAC OKAD OKAE OKAF OKAG OKAH OKAI OKAJ OKAK OKAL OKAM OKAN OKAR OKAS OKAT OKAU OKAW OKAY OKAZ

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.