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In all the world, Thorkildssen (Thorkildssen ) is an extremely rare unknown gender first name. Much more frequently, Thorkildssen is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Thorkildssen | Norway |
Terkelsen, Therkelsen, Thorkelsen, Thorkildsen, Torkelsen, Torkildsen, and Torkilsen