As a counterpoint:
“The richest families in Florence in 1427 are still the richest families in Florence”
https://qz.com/694340/the-richest-families-in-florence-in-14...
“The richest families in Florence in 1427 are still the richest families in Florence”
https://qz.com/694340/the-richest-families-in-florence-in-14...
People sharing a last name today can't be traced back to specific family which existed in past.