[IntrepidWorm]

Correct: his full name as given was "Lionardo di ser Piero da Vinci," meaning more or less Piero's son Lionardo from Vinci. Deriving a childs name from their lineage was incredibly common.

[IncRnd]

Lineage names still exist in the West, but lineage naming is not as common. See Ken Thompson, or even Johnson & Johnson's vaccine!