The name carries with it some personal reflection. 'Vaeltaja' is Finnish for 'wanderer', and I had this confirmed by an acquaintance of mine who hails from Finland themselves. Essentially, it was a name for a "reality-ender" NPC in a tabletop campaign that eventually fell through because I was an inexperienced DM; one that I hope to bring back in some form at a later date. The NPC was a mysterious figure who had the ability to travel through any dimension and timeline he so chose, for the sole purpose of communing with and bringing peace to the dead. I ended up basing the design off the character in my account picture, who is themselves from a game called The Mooseman. The sub-affix "Nomad of Eternity" is relative: 'nomad' is a synonym for 'wanderer', and since he can wander through any timeline - past, present, or future - he has access to all of eternity.
As time went on, the name sort of rooted itself into my personal life. Mentally, I never had the opportunity to sort of ground myself. I'm in a constant, perpetual existential crisis, and that stems even further into my identity. I don't really know who I am or what my purpose is, so I wander, and that's why I chose the name.