Surname O'Duffy (O'Duffy 
) , in all the world, is a rare last name. The surname O'Duffy is characteristic of Ireland, where it is quite a rare surname, New Zealand, where it is a rare surname, and Australia, where it is a very rare surname. In absolute terms, it most frequently occurs in Ireland, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
|---|---|
| O'Duffy | Australia, New Zealand, Ireland, United Kingdom, United States |
|
seán o'duffy Camogie administrator, IE (b. 1885) |
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| eimar o'duffy Irish writer, IE (b. 1893) |
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| paul staveley o'duffy British musician, GB (b. 1963) |
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| anne elizabeth o'duffy neurologist |
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Mr, Niall, Ellen, Elton, Irene, Sinead, Sierra, Ciaran, Philip, Denise, Declan, Daniel, Daragh, Gareth, Lorcan, Thomas, Eoghan, Freyja, Isobel, Michael, Ciarán, Katrina, Grace, Gavan, Gavin, David, Ms, Pat, Mary, Alan, Anna, Anne, Aine, Cian, Kate, Paul, Patrick, Eoin, Sarah, Simon, Susan, Conor, Ciara, Katie, Kevin, Peter, Ronan, Royan, Orla, and Larissa