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WORD HISTORY · CHALDEANOne word, several histories.Follow Kaldu into Greek, Latin, English—and see what we can and cannot say about its origin.

The name moves across languages and changes meaning. The forms below show a commonly cited route into English; they do not reveal what the ancient name originally meant.

Ancient AkkadianKalduPeople of southern Babylonia

AramaicKaldaieA form in the name’s later transmission

Ancient GreekChaldaioiΧαλδαῖοι · “Chaldeans”

Latin → EnglishChaldaeus → ChaldeanEnglish noun recorded in the 1580s; not the people’s origin date

What does Kaldu mean?

Kaldu is the ancient label for the people; māt Kaldi means “land of the Kaldu.” The deeper origin of the name is unknown. Southern Babylonia included marshlands, but “marshy land” is not an established translation of the name.

Specialists debate whether the l reflects a sound in the Chaldeans’ own language or an Akkadian sound change. That discussion does not establish a literal translation of the name. The supposed earlier form *Kašdu is not attested in the relevant specialist discussion. Hebrew Kaśdim is the biblical form; Genesis also mentions a person named Kesed, but that resemblance does not prove the name’s origin.

How the meaning shifted

Assyrian records attest Chaldean tribal groups in southern Babylonia by the early ninth century BCE. Nabopolassar founded the Neo-Babylonian dynasty in 626 BCE. “Chaldean dynasty” is a conventional name; his family origins remain debated. Later biblical and Greco-Roman writers also used “Chaldean” broadly for Babylonians; classical writers used it for astrologers and magicians.

Today, “Chaldean” also names a living Christian community and appears in the name Chaldean Neo-Aramaic. These modern uses have their own history; the map’s ancient tribal outlines are not modern community borders.

Encyclopaedia Iranica University of Chicago · ISAC Kogan · De Gruyter handbook Online Etymology Dictionary ORACC · cuneiform forms Joannès · dynasty origins

Research assembled 15 October 2026. Community evidence has its own dates. The atlas is a curated starting point, with sources available for further reading.