Across the world, Siôn (Sion 
, Shone 
, Джон 
) is a common unisex first name. The forename Siôn is habitual in Namibia, where it is quite a rare boy's name, the Democratic Republic of the Congo, where it is quite a rare unisex name, and Sri Lanka, where it is quite a rare masculine name. Measured by absolute frequency, the name is most common in the Democratic Republic of the Congo, Ethiopia, and Indonesia. Also, Siôn is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sion | United Kingdom, Myanmar, South Korea, Philippines, France |
| Shone | United Kingdom, Myanmar, Indonesia, Philippines, France |
| Джон | Kazakhstan, Ukraine, Belarus, Kyrgyzstan, Russia |
| Siôn | United Kingdom, United States, Australia |
Džons, Erwann, Evan, Gian, Gianni, Giannis, Giovan, Giovanni, Giuàn, Hannes, Hanns, Hans, Honsa, Honza, Huans, Ian, Ianka, Ieuan, Ifan, Ioan, Ioann, Ioannes, Ioannis, Ion, Ivan, Ivano, Ivans, Ivashka, Ivo, Iván, Iwan, Iwo, Jaan, Jack, Jan, Janka, Janos, Jean, Jehan, Jhoao, Joan, Joannes, Joao, Jogvan, Johan, Johann, Johannes, Johannès, Johano, John,
Siôn is also a prevalent name for the fictitious and mythical characters: Tarzan , the fictional character from Edgar Rice Burroughs's Tarzan of the Apes, Tarzan and the Lion Man; Dr. John Watson , the fictional character of Sherlock Holmes; Dick Grayson , the one of several fictional characters using the identity Robin, Batman & Robin; Jon Snow , the character in A Song of Ice and Fire, Game of Thrones and Mr. Krabs , the main character in SpongeBob SquarePants, The SpongeBob Movie: Sponge Out of Water, and in many other works.
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siôn cent Welsh poet (c.1400), GB (b. 1367) |
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| siôn ceri Welsh poet (b. 1450) |
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| siôn eos (b. 1450) |
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| siôn brwynog poet (b. 1510) |
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| siôn dafydd rhys Welsh scholar, GB (b. 1534) |
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| siôn phylip Welsh writer (b. 1543) |
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| siôn conwy Writer and patron of literature (b. 1546) |
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| siôn ap howel ab owain Welsh translator of the Rhetorica ad Herennium formerly attributed to Cicero, GB (b. 1550) |
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| siôn treredyn Welsh translator, GB (b. 1605) |
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| siôn ap siôn Welsh Quaker leader (c.1625–1697), GB (b. 1625) |
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| siôn dafydd las ‘family bard’ at Nannau, near Dolgelley, GB (b. 1650) |
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| siôn llewelyn Welsh poet, GB (b. 1690) |
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| siôn cadwaladr Poet from Meirionnydd, GB (b. 1800) |
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siôn simon Politician, activist (born 1968), GB (b. 1968) |
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siôn jobbins author and academic, GB (b. 1968) |
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Roe, Lutley, Taylor, Thomas, Hughes, French, Abraham, Charles, Romaine, Roberts, Douglas, Greaves, Jenkins, Edwards, Walters, Matthews, Phillips, Harrison, Hamilton, Williams, Pritchard, Griffiths, Lamont, Gilbey, Davies, Dennis, Keir, Ksor, Pugh, Rees, Hill, Fôn, Owen, Simon, Crees, Parry, Humphreys, Penny, Lewis, James, Jones, Evans, Hopes, Cavill, Connor, Benney, Boomsma, Phenis, Povey, and Vaughan-Thomas