Family name Oldag (Oldag 
) , all around the world, is a rare last name. The family name Oldag is characteristic of Germany, where it is a rare surname, the United States, where it is a very rare surname, and Thailand, where it is an extremely rare surname. In absolute terms, the name is most common in Germany, the United States, and Brazil. Very seldom, Oldag is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Oldag | Germany, China, Thailand, United States, Brazil |
| harald oldag German journalist, DE (b. 1899) |
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| hans oldag American athletics competitor (1901-1978), US (b. 1901) |
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| harald oldag (b. 1923) |
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| wolfgang oldag DE (b. 1931) |
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| matthias oldag DE (b. 1954) |
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| elizabeth wingfield oldag physicist at University of Texas at Austin |
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| astrid oldag |
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| ingo oldag |
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Mr, Lisa, John, Joan, Joao, Joel, Joye, Jens, Jean, Nico, Eric, Iris, Maria, Maike, Megan, Murat, Sarah, Susan, Scott, Alice, Chris, Candi, Dean, Cindy, Russ, Piet, Al, Ana, Amy, Ben, Don, Jon, Tom, Ulf, Uwe, Mary, Mark, Sara, Sven, Anna, Anne, Anja, Adam, Chad, Chas, Cody, Karl, Ralf, and Benno