Family name Ketilsdóttir (Ketilsdóttir 
) , in the entire world, is an extremely rare last name. The cognomen Ketilsdóttir is characteristic of Northern Europe, particularly Iceland, where it is quite a rare surname.
| auður djúpúðga ketilsdóttir 9th-century Icelandic settler, IS (b. 834) |
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| margrét ketilsdóttir IS (b. 1897) |
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| ása ketilsdóttir IS (b. 1935) |
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