It's actually spelled Æþelind, and pronounced with a long "A".
It means "noble serpent" in Old English, and I've discovered, to my surprise, that
a very similar name was actually used historically.
Originally, I spelled it "Æthelind" when writing by hand, but "Aethelind" just looked wrong when typing. I think one of my early BBS hang-outs or e-mail providers had a maximum of eight letters-which is particularly amusing in this day and age, when 6 to 8 alphanumerics is often a minimum.
If I actually have proper Unicode access, of course, then "AE Ligature-Thorn-E-L-I-N-D" is eight letters, but I'm not going to fight with log-in screens and Old English characters.