Last name Χατζηιωάννου (Χατζηιωάννου 
, Haji-Ioannou 
, Hadjioannou 
) , around the world, is a rare cognomen. The family name Χατζηιωάννου is characteristic of Cyprus, where it is quite a common surname, Monaco, and Bermuda, where it is quite a rare surname. In absolute terms, it is the most numerous in Cyprus, Greece, and the United Kingdom.
| VARIANT | COUNTRY |
|---|---|
| Χατζηιωάννου | Greece |
| Haji-Ioannou | Monaco, United Kingdom |
| Hadjioannou | Canada, Cyprus, United Kingdom, United States, Greece |
| Hatziioannou | Canada, United Kingdom, United States, Germany, Greece |
| ευάγγελος χατζηιωάννου Cypriot mayor, GR (b. 1874) |
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| κωνσταντίνος χατζηιωάννου GR (b. 1900) |
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| ανδρέας χατζηιωάννου Cypriot politician, CY (b. 1916) |
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| θεμιστοκλής χατζηιωάννου GR (b. 1927) |
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| σάββας χατζηιωάννου Greek association football player (1942-2009), GR (b. 1942) |
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| μαρία χριστίνα χατζηιωάννου Greek historian and university professor, GR (b. 1955) |
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| θεοδώρα χατζηιωάννου researcher, GR (b. 1970) |
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| ιωάννα χατζηιωάννου Greek weightlifter, GR (b. 1973) |
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| σταύρος χατζηιωάννου Greek musician, GR |
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| μαρίνα χατζηιωάννου Greek actress, GR |
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| μαργαρίτα χατζηιωάννου Greek set designer, GR |
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| βέτα χατζηιωάννου GR |
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