Question: What is this grapheme still in use as a letter in some languages, including Danish, Norwegian, and Icelandic that the Old English Latin alphabet had?
Sentence (from "Western Latin character sets (computing)"): These encodings were designed for representation of Italian, Spanish, Portuguese, French, German, Dutch, English, Danish, Swedish, Norwegian, and Icelandic, which use the Latin alphabet, a few additional letters and ones with precomposed diacritics, some punctuation, and various symbols (including some Greek letters).
Relevant evidence: No