Definitions by JulianKofu
The Uncle John Multiplier
The evolutionary and genealogical glitch where a family tree stops branching out and folds inward because ancestors never left their small towns. Instead of unique ancestors, the family tree copy-pastes the exact same historical figure (the original "Uncle John") dozens of times because distant cousins kept marrying each other.
Also used to describe the 60,000-year human genetic bottleneck where humanity almost went extinct, leaving us all technically as distant cousins. Much cooler and less boring than the academic term "pedigree collapse" (which sounds like bad dog food).
Also used to describe the 60,000-year human genetic bottleneck where humanity almost went extinct, leaving us all technically as distant cousins. Much cooler and less boring than the academic term "pedigree collapse" (which sounds like bad dog food).
Person A: "Bro, I traced my family tree back to 1400s England and discovered I have 2 million grandfathers!"
Person B: "Nah man, you've been hit by The Uncle John Multiplier. Half of those grandfathers are just the same dude named John appearing in twelve different spots on your chart because cars hadn't been invented yet."
Person B: "Nah man, you've been hit by The Uncle John Multiplier. Half of those grandfathers are just the same dude named John appearing in twelve different spots on your chart because cars hadn't been invented yet."
The Uncle John Multiplier by JulianKofu May 16, 2026