This is a symbol from the the video game Myst IV: Revelations (2004), a sequel of the famous point-and-click Myst. The symbol is seen on multiple occurrences in the age of Tohmana, on books and on the door of a certain chamber (no spoilers!).
Just my firstname. It is written in Ogham alphabet used between the 4th and 10th century to write primitive Irish. I have absolutely no knowledge of Irish history or community, I just find this old alphabet nice.