Last name Lenassi (Lenassi 
) , around the globe, is a rare family name. The cognomen Lenassi is habitual in Southern Europe, particularly Slovenia, where it is quite a rare surname, Bosnia and Herzegovina, and Serbia, where it is a rare surname.
| VARIANT | COUNTRY |
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| Lenassi | Bosnia and Herzegovina, Italy, Slovenia, United States, Serbia |
| alfredo lenassi IT (b. 1851) |
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| janez lenassi (1927-2008), SI (b. 1927) |
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| jule lenassi SI (b. 1924) |
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| mitja lenassi SI (b. 1931) |
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| marjana lenassi SI (b. 1932) |
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| metka lenassi researcher (b. 1978) |
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| nives lenassi SI |
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| jožica lenassi SI |
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| eva lenassi SI |
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