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Decode your Greek surname

Read this first: a surname ending is a pattern signal, not a verified fact. Families moved, married, migrated and were renamed across centuries — an -akis surname does not prove Cretan ancestry, only that it's associated with it. False friends exist too: some endings look alike across regions but have different origins. Treat every match below as a starting point for your own research, never a verdict.

What the endings tell you

Suffix(es)RegionMeaningSources
-akis Crete (also the Cyclades) A diminutive — 'little', hence 'son of'. Big Think / Strange Maps — 'How Greek surnames reveal their geographic origins' (Frank Jacobs, editorial map) (B), Sam Topalidis — 'The Origin of Current Greek and Turkish Surnames' (Pontos World), drawing on Catsakis (2003) (C)
-opoulos, -poulos The Peloponnese 'Descendant of'.
The popular 'from Latin pullus (chick/offspring)' etymology is contested — treat it as traditionally-derived, not settled.
 Big Think / Strange Maps — 'How Greek surnames reveal their geographic origins' (Frank Jacobs, editorial map) (B), Sam Topalidis — 'The Origin of Current Greek and Turkish Surnames' (Pontos World), drawing on Catsakis (2003) (C)
-idis, -ides, -adis, -iadis Pontos, Asia Minor, Eastern Thrace 'Son of' — the oldest patronymic form. Big Think / Strange Maps — 'How Greek surnames reveal their geographic origins' (Frank Jacobs, editorial map) (B), Sam Topalidis — 'The Origin of Current Greek and Turkish Surnames' (Pontos World), drawing on Catsakis (2003) (C)
-atos, -etos Kefalonia / the Ionian islands Patronymic. Big Think / Strange Maps — 'How Greek surnames reveal their geographic origins' (Frank Jacobs, editorial map) (B), Sam Topalidis — 'The Origin of Current Greek and Turkish Surnames' (Pontos World), drawing on Catsakis (2003) (C)
-oglou Greeks of Asia Minor From Turkish -oğlu, 'son of'. Big Think / Strange Maps — 'How Greek surnames reveal their geographic origins' (Frank Jacobs, editorial map) (B), Sam Topalidis — 'The Origin of Current Greek and Turkish Surnames' (Pontos World), drawing on Catsakis (2003) (C)
-eas, -akos The Mani (southern Peloponnese) Patronymic. Outer/Messenian Mani tends to -eas; Inner/Laconian Mani to -akos.
The Mani refinement is corroborated by Wikipedia's 'Maniots' article, citing L. Alexakis on the form and evolution of Mani surnames.
 Big Think / Strange Maps — 'How Greek surnames reveal their geographic origins' (Frank Jacobs, editorial map) (B), Wikipedia — 'Maniots', surnames section (citing L. Alexakis, 'Form and evolution of Mani surnames', mani.org.gr) (C)
-ou Cyprus Genitive — 'of' (a frozen patronymic; e.g. Georgiou = 'of George'). Especially characteristic of Cypriot surnames. Big Think / Strange Maps — 'How Greek surnames reveal their geographic origins' (Frank Jacobs, editorial map) (B), Wikipedia — 'Greek Cypriot name' (C)

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