1970s: variant of Teague, anglicized spelling of the Irish name Tadhg, used since the mid 17th century as a nickname for an Irishman.

• tyke from Late Middle English:

  The word tyke (from Old Norse tík ‘bitch’) was first a term for a dog, especially a mongrel. It quickly became a rough man and then a Yorkshire tyke, ‘a person from Yorkshire’, before being used as an affectionate term for a cheeky child. In Australia and New Zealand tyke is an offensive term for a Roman Catholic. This is an alteration of Taig, a Northern Ireland Protestant's insulting name for a Catholic, from the Irish name Tadhg, which has been used since the 17th century as a nickname for an Irishman.