thorn
Thorn is a letter in ðe Old Eŋlish, Goþic, Old Norse, Old Sƿedish, and modern Icelandic alphabets, as ƿell as Middle Scots and some dialects of Middle Eŋlish. It ƿas also used in medieval Scandinavia, but ƿas later replaced ƿiþ ðe digraph th, except in Iceland, ƿhere it survives!