I've had multiple name changes...and different accounts.
My first account was:
kiddo999 --> ROFLCune [ because I liked Suicune (used it a lot in competitive battling) and was into text speak and putting "ROFL" and "lol" in every sentence] --> Divine~Deoxys [Name changes were easily available, I'd rekindled my adoration for Deoxys, plus wanted a name change].
I then had a few other accounts with different names, but I always seemed to get trolled on the competitive battling forums...plus I'd post an RMT about every two days, the second one went 12 hours without a post I made another. And I was awful at competitive battling, and other stuff, probably to do with being younger and immature.
At one point during the lifespan of this account I created another, Blue Oak. Not sure why tbh, probably something to do with HeartGold and manga.
After Divine~Deoxys I briefly went by "kyo tohma" - the name of my tribalwars.net account. Which wasn't actually mine, I joined a bigger tribe, it was easier for them to give me an account they were co-managing and the conquer my old account than to conquer their account with mine.
I think that's possibly all of my other accounts up until my current one, so now I'll do my name changes for this account:
Unidentified Flying Aces [When I rejoined, older and wiser, around a year after initially signing up, I was really into the Xbox360 game H.A.W.X. ] --> Lance (UFA) [Lance was taken, I was really into Lance, particularly due to the PokéSpe character, and the fact that dragons remain my favourite pokémon, despite some of the rubbish ones in Gen V. (UFA) because I wanted people to know who I was. ] --> Amore.
My final name-change, just over a month after the last one, was when they were offering one final name-change. I chose it because I like Italy (was actually going there that year too), having a foreign word made me think I sounded fancy, and I thought one-word usernames looked better next to the supporter status bar. Whether I had one or not then, I don't know but I knew I would be getting one if I didn't already have one.
So...yeah, the history of my account(s) which shows I've actually been here since 2008, and had around 8 accounts in the space of around 12 months, then stuck with this one ever since.