Last name Thörnroos (Thörnroos 
) , in the world, is a very rare family name. The last name Thörnroos is characteristic of Northern Europe, particularly Sweden, where it is a rare surname, and Finland.
| VARIANT | COUNTRY |
|---|---|
| Thörnroos | Finland, Sweden |
| veronica thörnroos Finnish politician, FI (b. 1962) |
|
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| jan-tore thörnroos (b. 1960) |
|