'Ruler' in the Bible

And behold, a man {who was named} Jairus came, and this man was a ruler of the synagogue. And he fell down at the feet of Jesus [and] began imploring him to come to his house,

But some of them said, "By Beelzebul the ruler of demons he expels demons!"

But the ruler of the synagogue, indignant because Jesus had healed on the Sabbath, answered [and] said to the crowd, "There are six days on which it is necessary to work. Therefore come [and] be healed on them, and not on the day of the Sabbath!"

And a certain ruler asked him, saying, "Good Teacher, [by] doing what will I inherit eternal life?"