'Ruler' in the Bible

And the scribes who came down from Jerusalem, said, He has Beelzebub, and, By the ruler of evil spirits he sends evil spirits out of men.

And while he was still talking, they came from the ruler of the Synagogue's house, saying, Your daughter is dead: why are you still troubling the Master?

But Jesus, giving no attention to their words, said to the ruler of the Synagogue, Have no fear, only have faith.

And they came to the house of the ruler of the Synagogue; and he saw people running this way and that, and weeping and crying loudly.