Cognomen Mcgillycuddy (Mcgillycuddy 
) , throughout the world, is a rare family name. The surname Mcgillycuddy is habitual in Ireland, where it is quite a rare surname, Switzerland, where it is a very rare surname, and the United Kingdom. In absolute terms, the name is most common in Ireland, the United States, and the United Kingdom. Much less frequently, Mcgillycuddy is the forename as well as the last name.
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| Mcgillycuddy | United Kingdom, Ireland, Australia, China, United States |
| donogh mcgillycuddy (born 1623) (b. 1623) |
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| dennis mcgillycuddy (1718-1735) (b. 1718) |
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| cornelius mcgillycuddy (born 1720) (b. 1720) |
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| denis mcgillycuddy (born 1747) (b. 1747) |
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| richard mcgillycuddy, the mcgillycuddy of the reeks (1750-1826) (b. 1750) |
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| francis mcgillycuddy, the mcgillicuddy of the reeks (1751-1827) (b. 1751) |
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| eusebius mcgillycuddy Peerage person ID=503927 (b. 1754) |
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| daniel mcgillycuddy Peerage person ID=279195 (b. 1755) |
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| cornelius mcgillycuddy Peerage person ID=503958 (b. 1762) |
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| richard mcgillycuddy, the mcgillycuddy of the reeks (1790-1866) (b. 1790) |
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valentine mcgillycuddy United States Indian agent, US (b. 1849) |
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| daniel de courcy mcgillycuddy (born 1815) (b. 1815) |
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| daniel de courcy mcgillycuddy Peerage person ID=366219 (b. 1840) |
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| richard edward mcgillycuddy Peerage person ID=503941 (b. 1850) |
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| richard patrick mcgillycuddy, the mcgillycuddy of the reeks (1850-1871) (b. 1850) |
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Mr, Eoin, Marie, Megan, Shane, Alice, Chris, Conor, Karen, Kevin, Peter, Piers, Debra, Laura, Jenny, Minota, Sandra, Sheree, Sheila, Sorcha, Alison, Amanda, Enda, Erin, Nola, Tara, Ms, Kay, Joe, Tom, Ian, Mary, Mark, Mike, Sean, Alex, Audrey, Anna, Brid, Ross, Rory, Gary, Gene, Lina, Lian, Joss, John, Joan, Anne, and Celine