Where did last names come from?

did someone just decide like 3498752348 years ago "hey, i want to have a last name, i'll call myself Bob Saget"? *bob saget was the first name that came to mind ._. this obviously came out of boredom.... and i wish there was a category for curiosity... im sure i placed this wrongly. but some of you... show more did someone just decide like 3498752348 years ago "hey, i want to have a last name, i'll call myself Bob Saget"?
*bob saget was the first name that came to mind ._.

this obviously came out of boredom....
and i wish there was a category for curiosity...
im sure i placed this wrongly.
but some of you philosophists may know this answer?
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