She was his wife.
Cited passages
Abraham took another wife, and her name was Keturah.
Genesis 25:1 says "then again Abraham took a wife, and her name was Keturah." 1 Chronicles 1:32 calls her "Abraham's concubine." In biblical Hebrew those are two different legal statuses, and the Chronicler is demoting what Genesis promoted.
People have answered this in several ways; GEBible presents them as equal peers.
Cited passages
Abraham took another wife, and her name was Keturah.
The sons of Keturah, Abraham's concubine. 1 Chronicles 1:32
Cited passages
The sons of Keturah, Abraham’s concubine: she bore Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. The sons of Jokshan: Sheba and Dedan.
Examining the tension
What follows is one scholar’s way of reading this disagreement — a critical-historical view that often concludes the texts genuinely disagree. It draws on the peer-reviewed sources listed below and stands as one position among the answers above, presented for transparency, not as GEBible’s position.
How critical scholarship weighs this: Leans toward a genuine contradiction
This summarizes where critical scholarship tends to land on this tension — a report on the field’s center of gravity, not GEBible’s own ruling.
The lexical fact is simple. Genesis 25:1 reports that Abraham "again took a wife" (*wayyiqqaḥ ʾiššāh*), naming her Keturah; 1 Chronicles 1:32 introduces her sons as those of "Keturah, Abraham's concubine" (*pîlegeš ʾabrāhām*). In biblical Hebrew *ʾiššāh* (wife) and *pîlegeš* (concubine, secondary wife) mark distinguishable legal and social statuses, particularly with respect to inheritance and the legitimacy of offspring. The Chronicler, retelling the patriarchal genealogy centuries later, assigns Keturah the lower of the two.
The apologetic response, made by Archer and Mathews, is that the two terms are not mutually exclusive in ancient usage: a *pîlegeš* was a kind of wife, a woman could be designated by either term depending on the writer's focus, and the same individual might be "wife" in one frame and "concubine" in another. Crucially, Genesis itself wobbles. Genesis 25:6 distributes gifts to "the sons of the concubines that Abraham had" (*hap-pîlagšîm*, plural) while reserving the inheritance for Isaac — and since Hagar is already gone, the most natural referent of that plural is Keturah alongside Hagar. So even within Genesis, Keturah is functionally classed among the concubines despite the "wife" of 25:1. On this basis the harmonization is real and not merely ad hoc: the Chronicler did not invent Keturah's secondary status; he made explicit what Genesis 25:6 already implies. This is the strongest form of the defense, and it substantially relaxes the tension.
What the lexical defense does not erase is the Chronicler's evident purpose, which Sara Japhet and Gary Knoppers document in detail. The genealogies of 1 Chronicles 1-9 are not neutral copying; they are theological cartography. The Chronicler systematically organizes Israel's lineage to foreground the legitimate, elect line and to subordinate collateral branches. Designating Keturah a concubine rather than a wife harmonizes her sons (Zimran, Jokshan, Midian, and the rest, who become the Arabian and Midianite peoples) into a clearly secondary tier beneath Isaac, the son of Sarah. The Chronicler's choice of *pîlegeš* over *ʾiššāh* is thus best read not as a contradiction of Genesis 25:1 but as a deliberate clarification aligned with Genesis 25:6 and serving the Chronicler's hierarchy of descent.
Seen this way, the relationship between the two verses is genuinely a tension at the surface — one text says "wife," the other "concubine" — but it resolves at the level of usage and authorial intent. Genesis presents Keturah ambivalently (wife in 25:1, among the concubines in 25:6), and the Chronicler selects the status that fits both the Genesis 25:6 datum and his own genealogical agenda. The episode is therefore less a factual error than a window into how the Chronicler edits and standardizes inherited tradition. That observation — that scripture revises and tidies its own genealogies — is the substantive payoff, and it is more interesting than the bare lexical clash.
Where the critical reading lands: overstated as a flat contradiction; the wife/concubine difference reflects Genesis' own ambivalence (25:1 vs. 25:6) and the Chronicler's deliberate genealogical clarification, though it does evidence Chronicles editing the patriarchal record toward a hierarchy of legitimacy.
Sources for this reading