Fitzwilliam Sonatas is the name first given by Thurston Dart to an arrangement he made, based on two recorder sonatas by George Frideric Handel, which he recast as a group of three sonatas. The term was applied by later editors to the original two sonatas as Handel wrote them, and was also expanded to encompass several other sonatas for various instruments included in the Handel autograph manuscripts held by the Fitzwilliam Museum in Cambridge.