Sancha of Aragon (1478 in Gaeta – 1506 in Naples), or Sancia of Aragon, was an illegitimate daughter of King Alfonso II of Naples and his mistress Trogia Gazzella.

Sancha of Castile (21 September 1154/5 – 9 November 1208) was the only surviving child of King Alfonso VII of León and Castile by his second wife, Richeza of Poland.

(born 14 September 1961 in Hammersmith, London) an English actress and businesswoman best known as the former mistress of British Conservative Member of Parliament and Cabinet minister David Mellor which became public knowledge in 1992.