The naïve approach that I've seen quite a few times is just taking the first two characters and lobbing off the rest.

But now you have a bunch of monograms that look like “DR” or “JO” or “PÈ” which makes no sense as a monogram.

In Swift, `PersonNameComponentsFormatter` could be useful here. But when I was doing this for a web project, no idea what you’re supposed to do with nothing but some regular expressions and faith that you’ll have something serviceable.