William Napper or Naper may refer to: William Napper (English cricketer) (1816–1897) William Napper (Irish cricketer) (1880–1967) William Naper (died 1683), Fellow of the Royal Society William Napper (MP for Trim) (1661–1708), Irish politician William Napper (MP for Athboy) (c. 1716–after 1760), Irish politician
See also William Napier (disambiguation)