English Place-name Society

Survey of English Place-Names

A county-by-county guide to the linguistic origins of England’s place-names – a project of the English Place-Name Society, founded 1923.


Early-attested site in the Parish of St John's, Castlerigg and Wythburn

Historical Forms

  • Thirspott 1616 PR(Crosth)
  • Thrispott 1622 ib
  • Threspat 1774 Donald
  • Trespett 1787 ClarkeM
  • Thirlspott 1628 PR(Crosth)
  • Thurlspot 1675 Ogilby


The forms, late as they are, point clearly to an original þyrspott , 'giant's pot, pool, or depression.' Thirlspot is close to Thirlmere (supra 35), and the l in the latter name may have caused the modern development from Thirs - to Thirls -. We may possibly compare Therspettes (Nb), an aquatorium, 1256 AssNb. Cf. also Transactions of the Yorkshire Dialect Society , Vol. vii, Pt xliii, pp. 9–23.