One of the systems we currently use at work just shortens the first name to 1-4 characters and adds the last name. I still have to figure out on what criteria.

The bad thing about it is that it sometimes changes names to the other gender - think Erica to Eric. I never realized how often that could be done in my language by chance and it only affects female names.

Normally that would matter much but three weeks ago they established that account name as our new matrix chat handles…

Back in the day when a lot of things things were capped at 8 characters, my uncle used to work for a company where they had (first 7 letters of last name) + (first letter of first name).

At least until they hired a woman named Margaret Manspera. Luckily, mansperm@company.com was spotted in advance, and she was given margaret@company.com instead.