During local government reorganisation in 1971, one of the newly-created Welsh counties was given the name Dyfed. However, further reorganisation of local government during the 1990s, involving the creation of unitary authorities resulted in a return to the status quo, and the county of Dyfed was dissolved into its original component counties.
These include:
The name survives in that of institutions such as Dyfed-Powys Police.
The name Dyfed is also a Welsh (man's) forename.
wikipedia.org dumped 2003-03-17 with terodump