Cognomen Lønseth (Lønseth 
) , all over the world, is a very rare surname. The cognomen Lønseth is characteristic of Northern Europe, particularly Norway, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Lønseth | Norway |
|
martin lønseth NO (b. 1861) |
|
| carl lønseth (b. 1888) |
|
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|
mari holm lønseth Norwegian Lawyer and politician, NO (b. 1991) |
|
| inger lønseth Norwegian politician (b. 1945) |
|
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| pål lønseth Norwegian politician and lawyer (b. 1970) |
|
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| siri holm lønseth NO (b. 1986) |
|