The Heb. Kasdim is generaliy rendered 'Chaldees' (Ge 11:28), and in Jer 50:10; 51:24; 24:5; 25:12, and often, is used for 'Babylonian.' The word is derived from the Babylonian name Kald
And Haran died before his father Terah in the land of his nativity, in Ur of the Chaldees.
Thus saith Jehovah, the God of Israel: Like these good figs, so will I regard the captives of Judah, whom I have sent out of this place into the land of the Chaldeans, for good.
And it shall come to pass, when seventy years are accomplished, that I will punish the king of Babylon, and that nation, saith Jehovah, for their iniquity, and the land of the Chaldeans; and I will make it desolate for ever.
And Chaldea shall be a prey: all that prey upon her shall be satisfied, saith Jehovah.
And I will render unto Babylon and to all the inhabitants of Chaldea all their evil that they have done in Zion in your sight, saith Jehovah.
youths in whom was no blemish, but well-favored, and skilful in all wisdom, and endued with knowledge, and understanding science, and such as had ability to stand in the king's palace; and that he should teach them the learning and the tongue of the Chaldeans.
American Standard Version Public Domain