Simon son of Boethus (also known as Simon son of Boëthus,[1] Simeon ben Boethus[2] or Shimon ben Boethus[3]) (Hebrew: שמעון בן ביתוס) was a Jewish High priest (ca. 23 – 4 BCE) in the 1st century BCE and father-in-law of Herod the Great.[4] According to Josephus, he was also known by the name Cantheras (Hebrew: קתרוס).[5][6] His family is believed to have been connected to the school of the Boethusians,[7] and a family whose origins are from Alexandria in Egypt.[2]