An alphabetic system of inscribed notches for vowels and lines for consonants used to write Old Irish,chiefly on the edges of memorial stones,from the fifth to the early seventh century.

• 欧甘文字V形刻痕代表元音，线形刻痕代表辅音的字母系统。这一字母系统是用以书写古爱尔兰语的，在5世纪至7世纪早期主要刻在纪念石碑的边缘部分