ỽ

Ỽ (lower case: ỽ) is a letter employed in Middle Welsh texts. It represented the sounds of v, u, and w and – prior to inclusion in the Latin Extended Additional block of Unicode characters – was typically represented by the letter w in transcriptions. The Unicode code point for the capital letter is U+1EFC; that for the lower-case letter is U+1EFD.

The character was used between the 13th and 14th century in Welsh manuscripts

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Wikipedia