Last name Giannaros (Giannaros 
) , around the globe, is a rare cognomen. The last name Giannaros is characteristic of Greece, where it is quite a rare surname, Australia, where it is a rare surname, and South Africa, where it is a very rare surname. Measured by absolute frequency, it is commonest in Greece, the United States, and Australia.
| VARIANT | COUNTRY |
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| Giannaros | Greece, Australia, South Africa, France, United States |
| ioannis giannaros GR (b. 1858) |
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grigoris giannaros (b. 1936) |
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demetrios giannaros American politician, US (b. 1949) |
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| james giannaros Australian snooker player, AU (b. 1952) |
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| c. giannaros researcher ORCID ID = 0000-0001-9757-4462 |
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| theodore m giannaros physicist |
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Sam, Jenny, Jenna, Tulla, Nikos, Erica, Harry, Vasso, Irene, Ilias, Marios, Samira, Sophia, Sophie, Spiros, Angela, Angelo, Ariane, Arthur, Arlene, Amanda, Athena, James, Costas, Peter, Bruno, Pat, Joy, Tom, Mary, Mike, Alex, Anna, Kate, Paul, Ross, Ruby, Leon, John, Theo, Tina, Niko, Maria, Marie, Sofia, Steve, Chris, Karen, and Pavlos