Worldwide, Gísli (Gisle 
, Gísli 
) is a rare dominantly male, but uncommonly feminine first name. The forename Gísli is characteristic of Iceland, where it is quite a common male name, Norway, where it is quite a rare boy's name, and the Republic of the Congo. Very seldom, Gísli is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Gisle | Sweden, Norway, Republic of the Congo, United States, France |
| Gísli | Norway, United Kingdom, Iceland, United States, Denmark |
| gísli þorgautsson (b. 1015) |
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| gísli jónsson Icelandic bishop (b. 1515) |
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| gísli þórðarson (b. 1545) |
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| gísli guðbrandsson (b. 1565) |
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| gísli einarsson (b. 1571) |
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| gísli hákonarson (b. 1583) |
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| gísli oddsson Icelandic theologian, IS (b. 1593) |
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| gísli magnússon (b. 1621) |
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| gísli þorláksson 17th Century Icelandic bishop (b. 1631) |
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| gísli einarsson (b. 1621) |
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| gísli vigfússon (b. 1637) |
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| gísli magnússon (b. 1712) |
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gísli brynjúlfsson Icelandic writer, IS (b. 1827) |
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| gísli konráðsson (1787-1877) (b. 1787) |
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| gísli brynjúlfsson den äldre Icelandic archaeologist, IS (b. 1794) |
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Þór, Þorsteinsson, Marteinsson, Sigurðsson, Stefánsson, Aðalsteinsson, Baldvinsson, Konráðsson, Pétursson, Garðarsson, Guðmundsson, Jóhannesson, Tryggvason, Halldórsson, Hermannsson, Friðriksson, Sigurjónsson, Sigurgeirsson, Björgvinsson, Kristinsson, Ragnarsson, Gunnarsson, Ólafsson, Heimisson, Einarsson, Elíasson, Arason, Gylfason, Finnsson, Foster, Ævarsson, Sváfnisson, Pálsson, Grímsson, Jónsson, Helgason, Gunnlaugsson, Magnússon, Svendsen, Sverrisson, Sveinsson, Baldursson, Bachmann, Bragason, Björnsson, Bjarnason, Karlsson, Gíslason, Sigmarsson, and Kristjánsson