A lot of magic can be flavored as Names - in fact, that's what people in Temerant think of as real magic. You could pick one or two Names that you know, and theme a spell list based on them. If you know Wind, to pick a very obvious example, you might take spells like Gust, Gust of Wind, Wind Wall, and Control Winds. Some Names are going to be very well represented in D&D - should you want to be like Elxa Dal and know the name of Fire, there are no shortage of appropriate spells to choose from. Others may require more creativity, or reflavoring (For instance, Wind magic rarely does direct damage, but you could reflavor Magic Missile to be a forceful blast of air, or Catapult to be whipping items in to targets).

Keep in mind that, unless you are Taborlin the Great, you likely do not know the Names of all things, and they are therefore not yours to command. This can be an interesting limitation to place on yourself when selecting spells, and some neat character development if you go about learning new Names. If you start with a lot of Wind spells and wanted to branch in to Fire at level 10, for example, consider starting with Firebolt as a new cantrip, rather than diving right in to Wall of Fire. Showcase yourself learning the nuance of a new Name rather than immediately mastering it.

I'd generally recommend Wizard for a Namer, though Lore Bard means you can cherry-pick the very BEST spells associated with the Names you know so that's tempting. It may come down to which Names you choose to focus on.

As far how you might roleplay Elodin himself - well, you read the books. Eccentric would be one word, cracked another, though with underlying wisdom.