This exists everywhere, though, so Sweden's personnummer isn't exactly unique in this case.
For a small subset of examples, take Norway's fødselsnummer[0] or Iceland's identification numbers[1] or Ireland's PPS number[2].
[0] - https://no.wikipedia.org/wiki/F%C3%B8dselsnummer
[1] - https://en.wikipedia.org/wiki/Icelandic_identification_numbe...
[2] - https://en.wikipedia.org/wiki/Personal_Public_Service_Number
This exists everywhere, though, so Sweden's personnummer isn't exactly unique in this case.
For a small subset of examples, take Norway's fødselsnummer[0] or Iceland's identification numbers[1] or Ireland's PPS number[2].
[0] - https://no.wikipedia.org/wiki/F%C3%B8dselsnummer
[1] - https://en.wikipedia.org/wiki/Icelandic_identification_numbe...
[2] - https://en.wikipedia.org/wiki/Personal_Public_Service_Number