Cognomen Duncumb (Duncumb 
) , in the entire world, is a rare surname. The surname Duncumb is habitual in Isle of Man, where it is quite a rare surname, New Zealand, where it is a rare surname, and Norway. Measured by absolute frequency, this name is the most popular in the United Kingdom, New Zealand, and Isle of Man. Much less frequently, Duncumb is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Duncumb | Norway, United Kingdom, Poland, New Zealand, Isle of Man |
| john duncumb antiquarian, GB (b. 1765) |
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| mabel kathleen duncumb (1922-1981) (b. 1922) |
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| peter duncumb British physicist (b. 1931) |
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| joseph w duncumb researcher |
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Mr, Alison, Andrew, Robert, Jackie, Jadran, Joseph, Hannah, Fraser, Michael, Charlie, Katrina, Kenneth, Margaret, Patricia, Lorraine, Stuart, Morgan, Donna, Peter, Ms, Sam, Ben, Pat, Lee, Jay, Tom, Nicholas, Bill, Jean, Emma, Iain, Susan, Carol, Colin, Clare, John, and Elizabeth