Cognomen Sigafoos (Sigafoos 
) , in the world, is a rare last name. The family name Sigafoos is habitual in the United States, where it is a rare surname, New Zealand, where it is a very rare surname, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in the United States, Germany, and New Zealand.
| VARIANT | COUNTRY |
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| Sigafoos | Germany, Canada, New Zealand, United States, United Kingdom |
| frank sigafoos American baseball player, US (b. 1904) |
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| robert summer sigafoos (b. 1920) |
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| jeff sigafoos New Zealand professor of educational psychology, NZ (b. 1950) |
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| brian sigafoos college basketball player (2001–2003) Harvard |
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| _ sigafoos college basketball player (1962–1962) Colorado State |
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| dave sigafoos college basketball player (1963–1964) Colorado State |
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Bj, Alan, Andy, Adam, Chad, Cori, Beth, Brad, Bill, Karl, Kate, Kaye, Keri, Kiel, Kris, Paul, Rose, Rome, Ruth, Ryan, Dana, Dave, Sean, Dale, Seth, Shem, Mia, Ann, Amy, Ben, Bob, Kim, Ray, Dan, Guy, Jay, Jon, Joe, Jim, Tom, Tim, Val, Mary, Mark, Matt, Mike, Shay, Shea, and Dawn