During local government reorganisation in 1974, the newly-created administrative county covering Cardiganshire, Carmarthenshire and Pembrokeshire 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 Dyfed was dissolved into its original component counties.
The name survives in that of institutions such as Dyfed-Powys Police.
The name Dyfed is also a Welsh (man's) forename.