Last name Jonaitis (Jonaitis 
) , around the globe, is quite a rare family name. The family name Jonaitis is habitual in Northern Europe, particularly Lithuania, where it is quite a common surname, Latvia, where it is quite a rare surname, and Ireland, where it is a rare surname. In absolute terms, it is commonest in Lithuania, the United States, and Latvia. Much less frequently, Jonaitis is the forename as well as the last name.
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| Jonaitis | Ireland, United States, Latvia, United Kingdom, Lithuania |
| kazys jonaitis Lithuanian Righteous Among the Nations, LT (b. 1918) |
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| izidorius jonaitis (b. 1909) |
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| henrikas jonaitis LT (b. 1913) |
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| kazys jonaitis Lithuanian serial killer and rapist (b. 1943) |
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| leonas jonaitis (b. 1938) |
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| aldona jonaitis American writer, US (b. 1948) |
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| vytautas alfonsas jonaitis LT (b. 1938) |
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| liudas jonaitis Lithuanian politician, LT (b. 1954) |
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| giedruis jonaitis LT (b. 1963) |
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| romualdas jonaitis LT (b. 1970) |
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| ly jonaitis Venezuelan-Letonian beauty queen, VE (b. 1985) |
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| marius jonaitis LT (b. 1984) |
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Mr, Rima, Riã, Gary, Lena, Lisa, Lori, Lutz, Jane, Jose, Rita, John, Joey, Jeff, Juan, Tony, Tera, Nils, Ivan, Maria, Marie, Joao, Rich, Rose, Raul, Al, Ana, Ann, Amy, Kã, Pat, Ray, Dan, Jan, Joe, Jim, Tom, Mary, Mark, Sean, Stan, Alan, Arã, Cody, Kari, Paul, Margo, and Matas