Caernarfon (the original Welsh spelling is now almost always used in preference to the anglicised forms, "Caernarvon" or "Carnarvon") is a royal town in Gwynedd, northwest Wales.
The name comes from Welsh Caer yn Arfon = "castle in Arfon", referring to the Roman fort named Segontium. Arfon means "[region] opposite Anglesey". In Welsh it is pronounced [kaɨrˈnarvɔn] (approximately "kire-NAR-von"), but it tends to be pronounced /kəˈnɑːvən/ in English.
Source: CIA Factbook, Wikipedia
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