Family name Κυριακού (Kyriakou 
, Kyriacou , Κυριακού ) , in all the world, is a common surname. The last name Κυριακού is characteristic of Cyprus, where it is a widespread surname, Greece, where it is quite a common surname, and Australia, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Cyprus, Greece, and the United Kingdom. Very seldom, Κυριακού is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kyriacou, Kyriakou | Greece, Australia, United Kingdom, United States, Cyprus |
| Κυριακού | Greece |
| εμμανουήλ κυριακού GR (b. 1750) |
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| τέρψη κυριακού Greek painter, GR (b. 1916) |
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| ρένα κυριακού Greek musician, GR (b. 1917) |
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| άννα κυριακού Greek actress, GR (b. 1929) |
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| κυριακού πελαγία Cypriot singer, CY (b. 1936) |
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| μίνως κυριακού Greek businessman (1942-2017), GR (b. 1942) |
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| μαρία κυριακού Cypriot politician, CY (b. 1950) |
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| γεώργιος κυριακού Cypriot mayor, CY |
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| κωνσταντίνος κυριακού Greek actor, GR |
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