Cognomen Lagae (Lagae 
) , around the world, is quite a rare surname. The surname Lagae is habitual in Belgium, where it is quite a common surname, France, where it is a rare surname, and Czechia. In absolute terms, it is the most numerous in Belgium, France, and the United States. Much less frequently, Lagae is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Lagae | Tanzania, Belgium, Poland, United States, France |
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jules lagae medallist, sculptor, BE (b. 1862) |
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| c.-r. lagae Roman Catholic bishop (b. 1882) |
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| léonce lagae Belgian politician, BE (b. 1894) |
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| andré lagae Belgian politician (1919-1989), BE (b. 1919) |
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| wim lagae (b. 1964) |
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| johan lagae (b. 1968) |
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| lieven lagae researcher |
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| liesbet lagae |
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| pierre lagae BE |
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Mr, Piet, Remy, Rita, Rudi, Ryan, Dany, Dirk, Gary, Leen, Loic, Jack, John, Jens, Jean, Trui, Tine, Noel, Nele, Eddy, Eric, Erik, Paul, Koen, Bram, Beau, Ms, Sys, Ann, Amy, Kim, Rik, Luc, Jan, Jos, Jim, Eris, Tom, Els, Vã, Ine, Wim, Marc, Maud, Sien, Sven, Akim, Bart, Tim, and Emma