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Timeline of the etymology of the term ‘algorithm’
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The following table lists over 100 sources from antiquity to modern times. Summaries and links to the originals are provided for almost every source. The table presents a coherent overall picture that comprehensively supports the findings of
Yuval Noah Harari describes “algorithm” as one of the central concepts of our time. In the age of AI, algorithms determine information flows, visibility, and evaluation - and thus power. At the same time, the term itself has become the subject of intensive research: countless
In lexicons, encyclopedias, and specialist literature, the explanation still dominates that the word algorithm arose from the Latinization of the name al-Ḫwārizmī. He was an outstanding scholar of the 8th/9th centuries and a pioneer of algebra. This narrative feels so self-contained that it appears as
Thesis A examines whether the RAE’s (Real Academia Española) alternative derivation can be reconstructed - linguistically, culturally, and phonetically - so that it can serve as a serious explanation for the origin of algorismus/algorithmus.
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Accordingly, the focus below is not on a personal name,
Thesis B tests whether the RAE idea from Thesis A can be found in medieval usage - i.e., whether algorismus/algorithmus in European primary sources is understood functionally (as a calculating art/method), and not as the personal name of al-Ḫwārizmī.
The benchmark is simple: what do the
Thesis C examines when the now-dominant al-Ḫwārizmī narrative emerged. What is established is that it was first formulated in the 19th century as a mere conjecture. From the very beginning, its content was back-projected. This aligns with the results of Theses A and B (a
At the end of the analysis, an overall conclusion is drawn: all three theses—(A the al-ġubār word root, B functional medieval usage, C 19th-century back-projection)—are each plausible, well supported, and coherent (a “green light” for each). Thesis C is especially strongly evidenced: the eponym narrative
