Our policy at work was first initial then surname, I was lharby. The IT manager was pretty inflexible on this. Then Carla Unterrainer came to work for us. True story
We generally go surname, first initial, maybe a number, up to 8 characters. Anything like this we would change in a heartbeat if we noticed it or they brought it up. We also have a fair amount of exchange students from Japan and China. You can use your imagination there.
That "l" at the end wasn't always an "l".