Cognomen Donellan (Donellan 
) , in the world, is a rare family name. The cognomen Donellan is habitual in Ireland, where it is a rare surname, Australia, and the United States, where it is a very rare surname. In absolute terms, the name is most common in the United States, Australia, and the United Kingdom. Very seldom, Donellan is the forename as well as the last name.
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| Donellan | Australia, Canada, Ireland, United States, United Kingdom |
| catherine donellan (born 1728) (b. 1728) |
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| john donellan Donellan, John (1737/8–1781), poisoner (b. 1738) |
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| john donellan Peerage person ID=423819 |
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| jane donellan Peerage person ID=306136 |
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| margaret donellan (died 1645) |
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| malachi donellan British Royal Navy officer, commander in 1844 |
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| malachy donellan Peerage person ID=377713 |
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| frances donellan Peerage person ID=348114 |
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| john donellan Peerage person ID=334208 |
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| edmund donellan Peerage person ID=267783 |
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| john donellan (died 1781) |
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| edmond donellan Peerage person ID=334800 |
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| joseph donellan Peerage person ID=143848 |
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| eliza donellan (died 1836) |
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| edmund donellan Peerage person ID=431327 |
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Sam, Syndi, Sydni, Amber, Aimee, Chloe, Betty, Brian, Bruce, Kathy, Scott, Katie, Kevin, Perie, Peter, Polly, Deven, Debra, Layne, Lewis, Linda, Keith, Susan, Marie, Zach, Tom, Mary, Mark, Sean, Adam, Bill, Kate, Paul, Rose, Rory, Lisa, Lori, Jane, John, Joan, Jody, Judy, Jill, Nick, Eric, Ezra, Janis, and Jacob