In the entire world, Karl-Otto (Karl-Otto 
) is quite a rare boy's forename. The given name Karl-Otto is habitual in Germany, where it is quite a rare male name, and Sweden, where it is a rare male name. Parts of the name also exists independently as a first name Karl, and a first name Otto.
| VARIANT | COUNTRY |
|---|---|
| Karl-Otto | Hungary, France, Norway, Sweden, Germany |
| karl-otto von der malsburg DE (b. 1790) |
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karl-otto kiepenheuer German astronomer (1910-1975), DE (b. 1910) |
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karl-otto hartjen German politician (1920-1972), DE (b. 1920) |
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karl-otto apel German philosopher (1922-2017), DE (b. 1922) |
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| karl-otto lang DE (b. 1875) |
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karl-otto edel German engineer, DE (b. 1939) |
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| karl-otto friedrich krafft von wechmar (born 1896) (b. 1896) |
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| karl-otto gutjahr DE (b. 1895) |
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| karl-otto leukefeld German officer and Knight's Cross recipients, DE (b. 1913) |
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| karl-otto frielinghaus German university teacher (1913-2000), DE (b. 1913) |
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| karl-otto weber German navy officer and WWII submarine commander (1914-1999), DE (b. 1914) |
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| karl-otto schultz German navy officer and WWII submarine commander, DE (b. 1914) |
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| karl-otto habermehl German virologist, DE (b. 1927) |
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| karl-otto vorlaender (b. 1919) |
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| karl-otto schlau LV (b. 1920) |
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Mohr, Becker, Burger, Kaiser, Dreher, Glaser, Lorenz, Noelle, Wagner, Ulrich, Müller, Schultz, Schmidt, Schmitt, Cavalar, Pfeifer, Gruhler, Haubert, Wiedenroth, Hartmann, Schröder, Schneider, Schulz, Zeiss, Weber, Waara, Apel, Koch, Lang, Jung, Heck, Falk, Mayer, Meier, Sauer, Soßdorf, Schöllkopf, Brand, Porip, Pfaff, Reker, Götz, Lange, Hanss, Haaß, Herre, Frank, Fritz, Braun, and Kaltenbacher