ϻ U+03FB,ϻ GREEK SMALL LETTER SAN ←Ϻ [U+03FA] Greek and Coptic ϼ → [U+03FC]

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san (letter)

Wikipedia

This letter is derived from thePhoenician letter𐤑(ṣ,“tsade”).

ϻ• (s) (upper caseϺ,lower case)

1. (historical) The lettersan, denoting/s/ in someepichoric Greek alphabets before being supplanted bysigma (Σ).

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