Ergyng, also known as Aricon, was a Welsh kingdom of sub-Roman Britain which existed in present-day Herefordshire, England from 420 to 650. The kingdom was founded by Amlawdd Wledig following the end of Roman rule in Britain, and he established Ariconium (Weston under Penyard) as Ergyng's capital. In 650, when Onbraust ferch Gwrgant married King Meurig ap Tewdrig of Gliwissig, Ergyng became a part of Gliwissig.
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