'Uz, Hul, Gether and Mash,' as in Genesis 10:23, signify several kinds of knowledges derived from the knowledges of good, and anything pertaining those knowledges. Knowledges derived from the knowledges of good are natural truths, and anything pertaining to knowledges are actions based on them.

(参考: Arcana Coelestia 1234)

'Shem' can be understood to be internal worship, 'Japheth' is the corresponding external worship, 'Ham' is internal worship corrupted, and 'Canaan' is external worship separate from internal. These people never existed, but the kinds of worship had these names applied to them.

(参考: Arcana Coelestia 1140)