A Scottish and English surname, Crosby comes from the Old Norse terms of ‘kross’ and ‘byr’ which mean a cross farm or settlement. The spelling variations for Crosby include Cossby, Crosseby, Crosbie and Corsby. In northern England is where most with the Crosby surname reside. In Yorkshire, Lancashire, Cheshire and Lincolnshire have the greater Crosby populations. In Scotland the Crosby families originated in the southwestern regions of Wigtownshire and Dumfries-shire. Many Crosby families moved later into Stirlingshire, Midlothian, Lanarkshire, Roxburghshire and Renfrewshire counties. Some from Scotland resettled in Ireland and then to America and Canada. Within the United States the Crosby families originated in Massachusetts, New York, South Carolina, Georgia, Mississippi, Ohio, Maine, New Hampshire and Pennsylvania. Famous: Dennis Crosby (movie film actor), Richard S. ‘Bubba’ Crosby (professional baseball player), Harvey Francis Crosby (professional boxer), Jon Crosby (musician), Norm Crosby (comic), William Holmes Crosby Jr. (developed modern methods of blood transfusions and advanced practices of hematology), Bing Crosby (famous singer and actor), Andy Crosby (footballer of England) and David Crosby (singer with Crosby, Stills, Nash & Young).