Chapman is an English word for one who bought and sold, a dealer of any kind, gradually superseded by teh French 'marchand' which has given us Marchant and Merchant. As this new word was used by the wealthier people and those with continental connections, so 'chapman' went down in the world, narrowing in meaning until it came to signify nothing more than a Peddler or Packman and finally dropped out of use altogether. But it lives on still in numerous local names, such as 'Cheapside', and in the colloquial term 'chap', while its large score as a surname, far exceeding that of Merchant, shows it importance in the surname period as teh regular word for a dealer of any kind.

The surname Chapman is derived from the Old English word ceapman, which means Merchant. Therefore, this surname would have been taken by someone whose primary occupation was that of a merchant. The earliest record of someone bearing the surname Chapman in England was in Cambridgeshire, prior to the Norman Conquest in 1066.

Some references to Chapman:

In the Curia Regios Rolls (in progress; Pipe Roll Soc. 14, 1891), 1204 Hugh Chapman in Yorkshire.

Pipe Rolls: Record Commission, 3 vols, London 1833-44: 1207 Alice Chepman, Derbyshire.

Assize Rolls: 1266 Nicholas le Chipman, Staffordshire (Chipman is West Saxon).

Middle English Surnames of Occupation, 1100-1350: 1327 Henry le Chupman, Somerset.