Globally, Ketill (Kjetil 
, Keld 
, Kittel 
) is quite a rare masculine first name. The given name Ketill is characteristic of Northern Europe, particularly Norway, where it is quite a common masculine name, Denmark, where it is quite a rare boy's name, and Iceland. Not in comparison with a country's population, it most frequently occurs in Norway, Denmark, and the United States. Also, Ketill is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kjetil | Sweden, Norway, Spain, United States, Denmark |
| Keld | Sweden, Norway, Australia, United States, Denmark |
| Kittel | Germany, Norway, Austria, United States, France |
| Ketill | Iceland, Norway, United Kingdom, United States |
| ketill flatnose 9th-century Norse King of the Scottish Isles (b. 790) |
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| ketill örnólfsson (b. 860) |
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| ketill gufa örlygsson (b. 890) |
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| ketill þorsteinsson Roman Catholic bishop, IS (b. 1075) |
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| ketill jörundarson (b. 1603) |
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| ketill jensson Icelandic singer, IS (b. 1925) |
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| ketill larsen Icelandic actor, IS (b. 1934) |
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| ketill hanstveit athletics competitor, NO (b. 1973) |
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| ketill o. pedersen researcher |
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| ketill wether 785-806 |
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| ketill hermundarson |
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| ketill hallsson |
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| ketill gautreksson |
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| ketill fíflski |
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| ketill þorláksson |
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Lord, Hoel, Kremer, Jóelsson, Hanstveit, Helgason, Ingolfsson, Danielsen, Guðmundsson, Júlíusson, Ágústsson, and Gunnarsson