Etymology in the sources
Source-reportedA vernacular form of biblical Jaakob (“Jacob, James”), attested already in the Middle Ages.
Sources for this account (5)
- Wiktionary: JaakkoCC-BY-SA-4.0 · retrieved 2026-10-15
- Greek Wiktionary: JaakkoCC-BY-SA-4.0 · retrieved 2026-10-15
- French Wiktionary: JaakkoCC-BY-SA-4.0 · retrieved 2026-10-14
- Polish Wiktionary: JaakkoCC-BY-SA-4.0 · retrieved 2026-10-14
- Russian Wiktionary: JaakkoCC-BY-SA-4.0 · retrieved 2026-10-14
