This northwestern most part of Wales was first known as Arfon. This meaning over against, or near, the island of Mon (Anglesey). Caer' narfon thus meaning the stronghold (fort) in Arfon. Snowdon (3,471 ft.) rises quickly from the shore giving a natural boundary to this land.
The earliest JONES is dated 1538 - 1544. The case is found in bundle 1016/ No. 49. The suit is in the name of Sampson Jones of London, but listed as the son and heir of Humphrey Jones. The Plaintiff (s) is listed as Richard ap Evan ap Davy, clerk. The reason is "detention of deeds relating to land in Arduddaye & elsewhere". It would seem that Sampson Jones had moved to London (usually a step to represent the family's interest/business/trade), and his (most likely) relative, questioned part of the inheritance. Certainly a never ending story it is.
The following figure shows the geographic position of Carnarvon.
A detailed history and discussion of Carnarvon can be found in Annals and Antiquities of The Counties and County Families of Wales, by Nicholas, Vol. I, pp. 309 - 364.
The surname JONES is found next 1558 [Richard Jones and Margaret , bundle 100/ no. 38] and continues at a steady pace from this period of records. [ 1558 - 1579 ]