Perhaps a derogatory nickname from Old Norse tík, 'bitch, female dog' (compare English tyke, Icelandic tík). Less likely to be from Old Norse þýzkr, 'of one's nation' or an Old English cognate (compare German deutsch, Swedish tysk).
Tyke (plural Tykes)
- (Britain, informal) a Yorkshireman or Yorkshirewoman; a Yorkshire person
- (slang, soccer) someone connected with Barnsley Football Club, as a fan, player, coach, etc.