Yes. His name is on it.
They were known as the Pythagoreans.
Pythagoras
Pythagoras wife is Theano.
Pythagoras theorem
Her name was Pythais.
He was simply known as Pythagoras of Samos.
His only name in historical record is Pythagoras, he is sometimes called Pythagoras of Samos
Pythagoras of Samos
Pythagoras.
Pythagoras
His full name was simply "Pythagoras."
The name for the followers of Pythagoras was the Pythagoreans.
Pythagoras's mother's name was Pythais.
He was always reffered to as Pythagoras of Samos.
Firstly in Greek, then in English.Ὁ Πυθαγόρας ὁ Σάμιος or simply Ὁ Πυθαγόρας; Pythagoras of Samos or Pythagoras the Samian, Or Pythagoras Patel
He didn't name it. It is named after Pythagoras because he first developed the theorem.