We might think about putting names in a technological context here. Theoretically they are identifiers. I would argue that in some modern contexts they are spec

We might think about putting names in a technological context here. Theoretically they are identifiers. I would argue that in some modern contexts they are spectacularly bad at identifying people. The very strong cultural variation is one aspect of that. Anyway, when I lived in Mexico and signed up for internet they seemed to want to combine my first and middle name in a way. Either that or the guy at the internet store just decided to do that. But also if I remember Rappi kind of did that too. My (made-up) explanation was that it just came from a Spanish tradition or something where there are just so many people in close proximity with similar first names (Juan etc.) that you really need another name to differentiate. In my case it also made sense because both my middle and first name, though more 'Anglo' than a lot of Mexican names, are also extremely common.