... any more than your name is Doug da Ashton-under-Lyme or wherever it is you come from.

The surname Chadwick comes from the "village of Ceadda (or Chad)" and originates in the parish of Rochdale, Lancashire (now Greater Manchester). The name has spread over the centuries but is still well represented in the North West of England. I think the parallels with "Da Vinci" are quite strong.

DC