'Sidon' denotes people who possess celestial and spiritual riches -- which amounts to knowledge. Sidon was the firstborn son of Canaan. It's also the name of a city in Lebanon, and it's quite possible that Sidon (or Zidon) was its founder. See Isaiah 23:2, 4 and other places, and Arcana Coelestia 1199.

(Referencat: Arcana Coelestia 1156)