Cognomen Leffert (Leffert 
) , all around the world, is a rare family name. The last name Leffert is habitual in the United States, where it is a rare surname, Switzerland, where it is a very rare surname, and Canada. Much less frequently, Leffert is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Leffert | United Kingdom, Switzerland, United States, Canada, Netherlands |
| leffert lefferts US (b. 1774) |
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| leffert thelen poppinga DE (b. 1824) |
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| lisa leffert (b. 1962) |
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| joel leffert actor and stuntman |
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| lisa leffert researcher |
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