When Napoleon conquered Europe and instituted Napoleonic law, one of the changes was that everyone had to register a new last name at the local center of government instead of the church. No more son of etc.
Many picked funny names in protest because they didn’t think napoleon would be around very long. Some of the dutch names are funny with meaning like outhouse, or shit house, stuck in pants, etc.
Luckily my ancestors picked bird song. But the funny thing is someone in the next county could pick the same name. So we have different tribes with the same name, not related at all.
My Swedish ancestors had to pick new surnames at some point when Sweden got in a big war and started drafting all the villagers. There were just too many “Private Andersons” for the drill instructors to give individual people commands, so they all had to pick new names :)