My ign okmayy comes from a ign family (the okays) so I will just tell the story of my original/main ign, may2070.
My sister was really into Pokemon back in the day. She owned most of the Gameboy Advance games and she would watch the anime almost every single day. I decided to give one of her Pokemon games a try so I loaded up a new save file on the game Pokemon Sapphire. In order to determine which player character you will be using, the game asks you the question "are you a boy or a girl?" I picked girl for obvious reasons, and I realized the girl avatar looked a lot like May from the Pokemon anime, so that's what I decided to name her. Ever since then, that name just stuck. I would use it for stories and usernames ever since.
The 2070 part comes from something else though. In 2011, my sister was into Club Penguin so I decided to make my own Club Penguin account. I wanted to name it May444 (four is my favourite number lol) but that was taken so I changed it to May443. My sister's cp username was rocky2070. Then we got bored of Club Penguin, so we asked our dad if we could get Minecraft. We eventually got an account and decided to share it, so we combined our usernames from Club Penguin which resulted in may2070. I changed it a few times but I've always made it a common pattern to make sure my Minecraft igns have the name May in it