Cognomen Loosli (Loosli 
, وسلي 
) , in all the world, is quite a rare family name. The last name Loosli is habitual in Switzerland, where it is quite a common surname, Eswatini, where it is quite a rare surname, and Chile, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Switzerland, the United States, and Eswatini. Much less frequently, Loosli is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Loosli | Eswatini, Switzerland, France, United States, Germany |
| وسلي | Iran |
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carl albert loosli Swiss writer (1877-1959), CH (b. 1877) |
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arthur loosli Swiss concert singer and painter (1926-2021), CH (b. 1926) |
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| walter loosli Swiss coxswain, CH (b. 1901) |
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| paul werner loosli CH (b. 1895) |
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| john k. loosli (b. 1909) |
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| peter w. loosli stage actor (1919-2011) (b. 1919) |
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| theo loosli Swiss conductor and choir director, CH (b. 1924) |
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david loosli road bicycle racer, CH (b. 1980) |
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| walter loosli Swiss sculptor and stained-glass artist (1932-2015), CH (b. 1932) |
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sylvain loosli French poker player, FR (b. 1986) |
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noah loosli association football player, CH (b. 1997) |
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| hansueli loosli Swiss business executive, CH (b. 1955) |
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| peter loosli cyclist, CH (b. 1958) |
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| ruth loosli Swiss author, CH (b. 1959) |
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| martin loosli CH (b. 1956) |
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