Surname Lasswell (Lasswell 
) , worldwide, is a rare family name. The cognomen Lasswell is habitual in the United States, where it is a rare surname, Canada, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Lasswell | United Kingdom, South Africa, United States, Canada, Venezuela |
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harold dwight lasswell American political scientist (1902-1978), US (b. 1902) |
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| mary lasswell American writer and painter (1905-1994) (b. 1905) |
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| fred lasswell American cartoonist, US (b. 1916) |
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| shirley slesinger lasswell American businessman (1923-2007), US (b. 1923) |
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