Samos
That was his forename. His name was Pythagoras of Samos. He was an Ionian Greek Philosopher/Mathematician and founder of the religious movement called Pythagoreanism. Most of the information about Pythagoras was written down centuries after he lived, so very little reliable information is known about him. He was born on the island of Samos (where he is named after), and might have travelled widely in his youth, visiting Egypt and other places seeking knowledge.
Crete is the answer
Cyprus
Crete
He was simply known as Pythagoras of Samos.
Pythagoras of Samos
Pythagoras
Pythagoras.
His only name in historical record is Pythagoras, he is sometimes called Pythagoras of Samos
His full name was simply "Pythagoras."
The name for the followers of Pythagoras was the Pythagoreans.
Pythagoras's mother's name was Pythais.