Short form of Alessandra, the Italian form of Alexandra. A major influence in establishing this as a common given name in the English-speaking world was George Meredith's novel Sandra Belloni (1886), originally published as Emilia in England (1864); the heroine, Emilia Sandra Belloni, is a beautiful, passionate young singer.
English (especially Yorkshire) and Scottish: occupational name for a fuller, Middle English walkere, Old English wealcere, an agent derivative of wealcan ‘to walk, tread’. This was the regular term for the occupation during the Middle Ages in western and northern England. Compare Fuller and Tucker. As a Scottish surname it has also been used as a translation of Gaelic Mac an Fhucadair ‘son of the fuller’.