he did not have one because there were no last names back then
He was simply known as Pythagoras of Samos.
patel
Firstly in Greek, then in English.Ὁ Πυθαγόρας ὁ Σάμιος or simply Ὁ Πυθαγόρας; Pythagoras of Samos or Pythagoras the Samian, Or Pythagoras Patel
Pythagoras of Samos
His only name in historical record is Pythagoras, he is sometimes called Pythagoras of Samos
Pythagoras
Pythagoras.
His full name was simply "Pythagoras."
Pythagoras's mother's name was Pythais.
The name for the followers of Pythagoras was the Pythagoreans.
He was always reffered to as Pythagoras of Samos.
He didn't name it. It is named after Pythagoras because he first developed the theorem.