Ever wondered what writing system, alphabet and sounds your Irish Gaelic speaking ancestors used ?
The Irish alphabet has only 18 letters with no k, j, x, y or z for example. Other letters approximate these sounds. In earlier written forms of Irish Gaelic, dots and other diacritics were used to elongate sounds or to add lenition.
This list contains an interesting explanation, and gives approximate English lettering and sounds. Interestingly, the names of Irish Gaelic letters (not to be confused with the sounds they make) are all named after spieces of trees found on the island.