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Siôn is a Welsh form of John, itself derived from the Hebrew Yohanan, meaning God is gracious. The circumflex accent marks the long vowel in Welsh orthography, distinguishing it from the shorter form Sion. It has been a common name in Wales for centuries, closely associated with Welsh cultural and religious life, and appears frequently in Welsh folklore and literature. Related forms include the English John, the Irish Seán, and the Scottish Gaelic Iain.