Usual English form of Dorothea. The name was not used in the Middle Ages, but was taken up in the 15th century and became common thereafter. It was borne by the American film star Dorothy Lamour (1914–1996, born Dorothy Kaumeyer).
English and Scottish: occupational name for a tailor, from Old French tailleur (Late Latin taliator, from taliare ‘to cut’). The surname is extremely common in Britain and Ireland, and its numbers have been swelled by its adoption as an Americanized form of the numerous equivalent European names, most of which are also very common among Ashkenazic Jews, for example Schneider, Szabó, and Portnov.