Commonest surname in the English speaking world

The commonest surname in the English-speaking world is Smith. The most recent published count showed 659,050 nationally insured Smiths in Great Britain, of whom 10,102 were John Smith and another 19,502 were John (plus one or more names) Smith. Including uninsured persons there were over 800,000 Smiths in England and Wales alone, of whom 81,493 were called A. Smith.