Arlxandnaea was a female elf adventurer sorceress who explored several planes of existence and mastered quite a bit of planar magic. She founded the city just as a hidden-refuge home for herself (and cache for her stuff but it grew into a haven for her friends and extended family (she took several male partners, down her long, long years). When she finally died, they ‘gave her to the trees’ (buried her under the entwined roots of several trees).