Last name Sigmundsdottir (Sigmundsdottir 
) , worldwide, is a rare family name. The family name Sigmundsdottir is habitual in Iceland, where it is quite a common surname, Norway, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sigmundsdottir | United States, Iceland, Norway |
| sesselja sigmundsdottir Icelandic pedagogue (1902-1974), IS (b. 1902) |
|