U+A7C9, Ꟊ
LATIN CAPITAL LETTER S WITH SHORT STROKE OVERLAY

[U+A7C8]
Latin Extended-D
[U+A7CA]

Gaulish edit

Letter edit

ꟉꟉ (lower case ꟊꟊ)

  1. (palaeography) A letter found as ⟨ꟉꟉ⟩ in some inscriptions; it may have been a geminate /sː/.