Family name Gailus (Gailus 
) , in the world, is a rare last name. The surname Gailus is characteristic of Germany, where it is a rare surname, Austria, and Canada, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Germany, the United States, and Canada. Very seldom, Gailus is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gailus | Germany, Austria, United States, Argentina, Canada |
| manfred gailus German historian of modern age, DE (b. 1949) |
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| chris gailus Canadian journalist, CA (b. 1967) |
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| christian gailus (b. 1967) |
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| björn gailus researcher |
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| bob gailus college basketball player (1970–1971) Columbia |
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| tim gailus DE (b. 1988) |
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| gustavs gailus (b. 1993) |
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Mr, Pedro, Roger, David, Donna, Linda, James, Jonas, Jorge, Tanya, Norma, Heiko, Frank, Willi, Martin, Monica, Miguel, Susana, Andrea, Ariana, Arshan, Ashley, Pablo, Robert, Klaus, Chris, Ms, Bob, Kim, Ron, Joy, Tim, Mark, Sven, Cole, Kurt, Paul, Rita, Jeff, Nils, Nobi, Eric, Fred, Marie, Stacy, Scott, Antje, Beate, and Ronald