Cognomen Lydman (Lydman 
) , around the world, is a rare family name. The last name Lydman is characteristic of Finland, where it is quite a rare surname, the United States, where it is an extremely rare surname, and Brazil. Very seldom, Lydman is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Lydman | United States, Italy, Finland, Peru, Brazil |
| sven lydman Finnish association football player (1900-1926), FI (b. 1900) |
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| jack wilson lydman American diplomat (b. 1914) |
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| toni lydman ice hockey player, FI (b. 1977) |
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| alf lydman |
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