It seems the vaccine-passport supporters are having a few technical problems with the New World Order, viz., people’s names are not standardized across countries.
The solution would seem to be entirely obvious: simply make it so that every individual on earth must adopt an alphanumeric sequence as their legal name, perhaps using a restricted subset of the Roman alphabet. Given a set of (say) 18 symbols, a string of 9 such symbols could represent 10+ billion people with ECC bits to spare, and is easily tattooed onto a citizen’s forehead at birth. Arrange into three easily-remembered groups of symbols, and we’ll all be ready to play our part in the Matrix. F1N-7EY-FM9 will be happy to accept a royalty of 1 credit for each name issued in this format.