Washington : 1: English: habitational name from Washington in Durham possibly also from Washington in Sussex. The Durham placename derives from an Old English personal name Hwassa Hwæssa + the Old English connective -ing- + tūn ‘farmstead estate’. In North America this surname is by far most common among African Americans (see 2 below).2: African American: from the personal name Washington (or George Washington) adopted in honor of George Washington the 1st president of the US; or adoption of the surname in 1 above in most cases probably for the same reason.
Source : DAFN2 : Dictionary of American Family Names 2nd edition, ©2022 by Patrick Hanks and Oxford University Press
FANBI : The Oxford Dictionary if Family Names in Britain and Ireland, ©2016, University of the West of England
ncG1vNJzZmidnmO0prrEmqWerF6kv6h70q6pp5mdmsBwo8Csn6Kml6m8rw%3D%3D