Elania al'Manir
Aes Sedai
I own that book!Imzadi I picked when I joined IRC, I needed a nick pretty fast, so I ran into the livingroom, looked at the books cover and found the book Imzadi (yes, from Star Trek) and since I've been using it... Actually it's soon 20 years ago...
I don't really remember how I chose my name because it was ten years ago. I might have used a generator to get ideas, and then modified one. I later realized that my first username shares many of the same letters as my middle real name (Lianne), so there might have been some sort of natural affinity there. I don't know why I chose al'Manir, or even a Two Rivers name in general. I also joined before encountering the character Elenia, and once I did, it made me simultaneously happy and mad that they were so similar. On the one hand, I came up with a name that was pretty similar to one that RJ made up. On the other hand, she's not a nice person and it made me feel less unique. I've been using this name or variations of it for ten years now though, so I feel very connected to it. Variations include Lanya (for simplicity and pronunciation) and Uhlahnya (Elania was taken, and this was a somewhat phonetic spelling).
I've also played around making usernames from other sites and RPGs (D&D and Pathfinder) from the Old Tongue.