Few issues with that @tfwnosuccubusgf
A) There were 32 dynasties
B) Most of the time, the Pharaoh was polygamous, taking multiple wives and concubines. Any of their children could inherit the throne, though they were traditionally male
C) They still faced a lot of inbreeding issues. The Ptolemaic Dynasty was specifically bad because they were Greeks who went full force to seem Egyptian without realizing older dynasties didn't have exclusively children of incest rule
So yeah, the Egyptologist in me has some particular qualms with that
@Tamerlane
That's an understatement. The Ptolemaic Dynasty was like a spider web, not a tree branch. Second place definitely goes to the Hapsburgs, though.
@Tamerlane
Contrary to popular belief, cosanguineous marriage in Alabama is lower than most European countries. Google a map of cosanguineous marriage by country, and what you see will astound you.
I sincerely hope people here don't think I actually condone incest. Bold of me to assume incest was the reason the Egyptians lasted so long. I did forget that a dynasty only encompasses a lineage and not an empire though, so thanks.