e.g. My ancestor David Wood had the family tee-name "King":
A friend of my mother's has to twin sons who married two women who had not only the same first name but also worked at the same company. Both ladies took their husbands' names, so they both had the same names. I imagine it must have been both funny and confusing.
When I last worked as a sysadmin, our ERP software used the name as a primary key for employees, so the idea of having two employees with the same name drives me a little bit crazy. (Even worse, though, it did not use FOREIGN KEY constraints but TRIGGERs. I am not sure about performance implications, but from an aesthetical perspective, this is just wrong.)
As someone with a common first name and common surname, this drives me bananas.
I still get emails from my graduate university to email: [email protected] meant for some undergraduate in a sea of 50k students, and have to reply that I've had that email for 20 years and they have the wrong person with a very common name.
Still, I feel for you. My primary concern, though, was that it made life more complicated for me. But email adresses were separate from ERP user names, and we did not have two employees with the same name, so [email protected] was good enough for our purposes.
https://www.bbc.com/worklife/article/20180404-do-our-names-p...
Of course, they might be a lot more insurance agents with my surname, but I wouldn't know one way or the other. Also, I like weird coincidences, so I'm rather biased.
That doesn't mean you're wrong, though. I just don't have enough data to support your idea.
One time someone from the USA contacted me on Facebook because he has the same surname, to see if we were related. We weren't, but his great-grandparents were from my hometown and emigrated to the USA around 1900 or so (before WW I, anyway).
Fun fact, in 1998, I did an internship at a local hi-fi shop and met a guy who actually had the exact same name as my father. But wait, there's more: He also was in the same line of work as my father. He did not look anything like my father, fortunately, that would have freaked my out in a big way.