Last name Sigtryggsdóttir (Sigtryggsdóttir 
) , all around the world, is a very rare family name. The last name Sigtryggsdóttir is habitual in Northern Europe, particularly Iceland, where it is quite a common surname.
| sigrún sigtryggsdóttir Icelandic teacher, IS (b. 1901) |
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| fanney sigtryggsdóttir Icelandic teacher, IS (b. 1911) |
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| margrét sigtryggsdóttir IS (b. 1958) |
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| kristín sigtryggsdóttir IS (b. 1960) |
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