Sarum, you might or might not have guessed, has it's roots Tolkien fiction. I've carried it through several games, but it started with Sarum TheBlack, an Avilonian fire wizard in Dark Age of Camelot (euro version, since I'm from the UK, before anyone from the US asks me if I ever met them), mainly because I read the full trilogy only a week or so before I created my DAoC account. Sarum, and sometimes TheBlack have been my main identifiers ever since. Sometimes I'll use variants, so any female characters I roll in RPGs/MMOGs are generally something Black, Kath and Lucy being my favourite roots for some reason known only to my subconscious mind (Lucilli Black in EVE, Kath'n Black in CoH for example).
I've since found out Sarum is actually a place, and a pretty important one historically speaking, here in England. It's near Salisbury, and was for quite a while a centre of political and religious power.. in fact there's a fair bit of evidence a couple of kings used Sarum as their main home. At some point (a google search will tell you) the church decided it needed a new, bigger cathedral, and so moved a short distance to the banks of a nearby river. Initially it was to be called New Sarum, but Salisbury is the name we have now.
Usually I'd use Sarum for RPG type games, and TheBlack in FPS type stuff... however, I couldn't register TheBlack for BF2, so I'm Sarum.