This happens to Irish/Scottish names too, such as McDonald, Mc being 'son of' in Gaelic language; the capital letter after Mc is wrongly changed to a lowercase letter.

Another very frustrating issue I run into, is hyphens not being allowed. My firstname and surname both have hyphens, and they are very common even in English based names.

"Константин Константинович Константинопольский" is a somewhat popular example of what one's design (graphical, computer system, whatever) should realistically allow for.

When I moved to Japan in 1983, not much was computerized and I was able to use my preferred short version of my name--eight letters or five katakana, surname last in both cases--for nearly everything. But over the years more and more places started requiring that names be input into labeled fields, which would reverse the given-name surname order. And many places started to insist on the same name as on my passport--nineteen letters, eleven or twelve katakana, depending on how I wrote it. Many input forms don't allow so many characters, none that I have encountered distinguish first from middle names, and there's usually no way to link that long name to the short name that I have been using for work and in daily life for more than forty years. It's a constant annoyance, not just for me but for other people.

This also usually applies to bank accounts, they have a character limit of around 16 characters for the whole name in most banks.

Of course it's not explicited in most places as 16 chars for a standard Japanese name is an exception, and some applications will silently cut when sending to their backend.

It's as fun as you can imagine it to be.

Even something as simple as buying a movie ticket can require submitting a name using only Japanese characters.

I can sympathize, the Spanish naming system makes things legitimately complicated sometimes. My wife has a Spanish style name Firstname(s) Fathername Mothername. But very very often she just goes by Firstname Fathername but it's not technically her legal name and is confusing in the non Spanish world because people assume otherwise that Mothername is her last name.

So for our son we decided to try to skip any confusion by doing what you are alluding to, and making her Fathername into his middle name, and giving him just my last name, in the English style.

And it worked, sort of, but then we discovered it was absolutely not legal to do that in my wife's country of origin. So kind of hilariously his registration in that country is: Firstname Mothername Fathername Mothername.

They forced us to repeat the middle name as part of his last name too. Just ridiculous. I thought at the least they would allow us to reverse them, but no.

The author there reads the point "Two different data entry operators, given a person’s name, will by necessity enter bitwise equivalent strings on any single system, if the system is well-designed" by thinking in terms of erroneous spelling, but also relevant is encoding issues such as lookalike characters.

Peter Biľak gives a story on bumping into this for the accent in his name. https://www.typotheque.com/articles/lcaron

"Sh" to "s" is simple enough. Sounds horrible to my ears, but maybe not to someone named Stavros ;). I've also been told that the double-p of Boppre looks alien in Greek.

And the "hu" syllable (like the sound an owl makes) was a genuine challenge. I think we went with χού. And now that my name is in the system, that's forever with this spelling, I guess.