ColossiansOne

Side by side, from the sources

Marduk vs Enlil

These two are identified with one another in the record, which is not the same as being the same figure. Marduk assumes Enlil's functions and titles in the Babylonian promotion.

Deity · Mesopotamian · c. 1100 BCE

Marduk

also called Bel, Merodach, Bēl, Bel-Marduk, Marutuk, Mardochaios, Merōḏaḵ, 𒀭𒀫𒌓

Splits Tiamat and builds the world from her body, and is voted fifty names and supreme authority for doing it.

Alignment
Disputed
Rank
King of the Gods
First attested
Enuma Elish · c. 1100 BCE
Named there as
Marduk
Texts naming it
3
Powers attributed
5
90attestedMesopotamian

Deity · Mesopotamian · c. 2500 BCE

Enlil

also called Ellil, Elil, Nunamnir, Bel, Lord Storm

Holder of the Tablet of Destinies, and the god who decrees the flood. He was supreme until Marduk's Babylonian promotion displaced him.

Alignment
Disputed
Rank
Lord of the Air
First attested
The Atrahasis Epic · c. 1700 BCE
Named there as
Enlil
Texts naming it
2
Powers attributed
3
60attestedMesopotamian

Where do they actually overlap?

Texts naming both

Powers credited to both

Common questions

Are Marduk and Enlil the same figure?

These two are identified with one another in the record, which is not the same as being the same figure. Marduk assumes Enlil's functions and titles in the Babylonian promotion. ColossiansOne records the link rather than asserting the identity: where texts disagree about whether two names denote one figure, the disagreement is what gets shown.

Which is older, Marduk or Enlil?

Enlil is the older name: first attested around c. 2500 BCE, against c. 1100 BCE for Marduk. Where the two dates are far apart, that gap is the whole reason the pair is worth comparing.

Do any texts name both Marduk and Enlil?

Yes — 1 text names both. A single text naming both figures is the strongest evidence available here that its author treated them as distinct, whatever later writers did with the pair.