Ancient Greek origin
Source-reportedFrom Ancient Greek Κάϊν (Káïn), in turn from Biblical Hebrew קַיִן (Qayin). The stress on the penultimate is extrapolated from the descended Italian Caino and Spanish Caín, but it is no proof of vocalic length and even contrasts with the original Greek.
Sources for this account (2)
- Wiktionary: CainusCC-BY-SA-4.0 · retrieved 2026-10-15
- Chinese Wiktionary: CainusCC-BY-SA-4.0 · retrieved 2026-10-14

