Quelch is an English surname, with alternative spellings of Quelche, or Qulch
It derived from the Old English nickname for a Celt or foreigner "woelisc", via Middle English "walsche", to Welch, Welsh or Wels(c)he. Notable people with the surname include:
Harry Quelch (1858–1913) one of the first Marxists in BritainJohn Quelch (b 1951) British-American academicJohn Quelch (pirate) (1666-1704) English PirateLorenzo Quelch (1862-1937) British trade unionist and politician, and younger brother of Harry QuelchTom Quelch socialist politician and son of Harry QuelchVictor Quelch (1891–1975) Canadian farmer, soldier and politician