Family name Γιαννάκης (Yiannakis 
, Giannakis , Yannakis 
) , all over the world, is quite a common surname. The cognomen Γιαννάκης is habitual in Greece, where it is quite a common surname, Cyprus, and Malawi, where it is quite a rare surname. In absolute terms, it is the most numerous in Greece, Malawi, and Australia. Very seldom, Γιαννάκης is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yiannakis, Giannakis | Australia, Malawi, Greece, United States, Cyprus |
| Yannakis | Australia, Germany, United Kingdom, Greece, United States |
| Γιαννάκης | Greece |
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γιαννάκης σουλτάνης GR (b. 1800) |
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| γιαννάκης γκρίτζαλης Greek rebel chief during the Greek War of Independence, GR (b. 1791) |
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| γιαννάκης κουτρούκης GR (b. 1785) |
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| γιαννάκης γιολδάσης politician, GR (b. 1800) |
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| γιαννάκης βύρας GR (b. 1800) |
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| γιαννάκης καπούτσης GR (b. 1800) |
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| γιαννάκης γιουρούκης GR (b. 1800) |
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γιαννάκης ομήρου Cypriot politician, CY (b. 1951) |
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παναγιώτης γιαννάκης Greek professional basketball player and coach, GR (b. 1959) |
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| γιαννάκης αγαπίου Cypriot politician, CY (b. 1932) |
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| σωτήρης γιαννάκης Cypriot politician, CY (b. 1932) |
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| γιαννάκης μάτσης Cypriot politician, CY (b. 1933) |
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| γιαννάκης σκορδής Cypriot mayor, CY (b. 1949) |
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| γιαννάκης θωμά Cypriot politician, CY (b. 1956) |
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| γεώργιος β. γιαννάκης Greek–American computer scientist, US (b. 1958) |
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