Chaldea
Chaldea was a land lying along the Euphrates river near its mouth, south of Babylon, part of what is now southern Iraq. It was a land of the Lord's second great church, the Ancient Church, which at its height had a wealth of knoweldge through its own sacred scriptures and the correspondences of nature. But as this church declined Chaldea came to represent people who use truths for evil purposes and thus profane and falsify them. Abram was born in Chaldea because of the greatness it had represented, but had to leave because of what it had become.
Arcana Coelestia # 1344
1344. Verse 15 And Shelah lived after he begot Eber four hundred and three years; and he begot sons and daughters.
'Shelah lived after he begot Eber four hundred and three years' means duration and state, 'Shelah' here, as previously, being that which is the offspring of knowledge, 'Eber' here, as previously, the worship in general of this Church. 'And he begot sons and daughters' means matters of doctrine.