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If you just use the {Alphabetic} Unicode character class (100K code points), together with a space, hyphen, and maybe comma, that might get you close. It includes diacritics. I'm curious if anyone can think of any other non-alphabetic characters used in legal names around the world, in other scripts? I wondered about numbers, but the most famous example of that has been overturned: "Originally named X Æ A-12, the chi…
There’s this individual’s name which involves a clock sound: Nǃxau ǂToma[1] [1] https://en.m.wikipedia.org/wiki/N%25C7%2583xau_%C7%82Toma
https://en.wikipedia.org/wiki/Click_consonant