Across the world, Sebastià (Sebastia 
, Sebastià 
) is quite a rare largely male, but infrequently female first name. The given name Sebastià is characteristic of Spain, where it is quite a rare boy's name, Paraguay, and Tanzania, where it is a rare female name. Likewise, Sebastià is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sebastia | Paraguay, Spain, Tanzania, France, Argentina |
| Sebastià | Finland, Spain, France, United States, Germany |
Seba, Sebastiaan, Sebastiaen, Sebastian, Sebastiano, Sebastianus, Sebastien, Sebastián, Sebastião, Sébastien, Себастиан, Себастиано, Себастьен, Себастьян, Себастьяно, Севастиан, סבסטיאן, سباستيان, سيباستيان, セバスチャン, セバスティアン, and 塞巴斯蒂安
| sebastià salelles ES (b. 1576) |
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| sebastià gelabert riera Spanish farmer, playwright and poet (1715-1768), ES (b. 1715) |
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| sebastià muntaner cabot ES (b. 1740) |
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sebastià badia i gibert Spanish politician (1824-1888), ES (b. 1824) |
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| sebastià sibiuda French translator, FR (b. 1800) |
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| sebastià anton pascual i inglada Spanish jurist and lawyer (1807-1872), ES (b. 1807) |
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| sebastià pujol ribes ES (b. 1800) |
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| sebastià gallès i pujal Spanish artist (1812-1900), ES (b. 1812) |
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sebastià junyent i sans Spanish painter and art critic (1865-1908), ES (b. 1865) |
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| sebastià cabot anguera ES (b. 1813) |
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| sebastià morlans Polític català s. XIX, ES (b. 1835) |
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| sebastià aliberch i molas ES (b. 1834) |
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| sebastià marimon i tudó Spanish physician (1848-1896), ES (b. 1848) |
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sebastià torres i planas Spanish politician, ES (b. 1900) |
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| sebastià torroja i tarrats Spanish journalist (1853-1937), ES (b. 1853) |
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