Kingdom of Elfed
Elfed, also known by its Old Welsh and Old English name of Elmet, was a Brythonic kingdom thought to have been an independent polity between the 5th century and sometime after the mid-7th century as part of the Old North. The people of Elmet survived as a distinctly recognised group for centuries after it was absorbed into Yorkshire in what later became the smaller area of the West Riding of Yorkshire, and now West Yorkshire, South Yorkshire and north Derbyshire.