Arfon survived as a geocultural name (Welsh: bro) over the centuries and remains in use today.

It covered the whole area of four former districts and most of a fifth from the administrative county of Caernarfonshire, which were all abolished at the same time:[1] The new borough was named Arfon.

The Arfon area merged with Dwyfor and Meirionnydd to become a county which the government initially called "Caernarfonshire and Merionethshire".

[3] During the transition to the new system, the shadow authority requested a change of name from "Caernarfonshire and Meirionethshire" to "Gwynedd".

The building ceased to be used as the bishop's residence in 1900, and was bought by the former Bangor City Council in 1903, who converted it to become their headquarters.