Cognomen Deagan (Deagan 
) , worldwide, is a rare family name. The cognomen Deagan is characteristic of Australia, where it is a rare surname, the United States, where it is a very rare surname, and the United Kingdom. Very seldom, Deagan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Deagan | United Kingdom, South Africa, Philippines, Australia, United States |
| j. c. deagan American musician, US (b. 1853) |
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| jimmy deagan Australian rules footballer, AU (b. 1898) |
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| albert deagan Australian rules footballer, AU (b. 1902) |
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| kevin deagan Australian rules footballer, AU (b. 1923) |
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| paddy deagan Australian rules footballer (1931-2016) (b. 1931) |
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| kathleen a. deagan American archaeologist, US (b. 1948) |
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Mr, Tony, Tina, Will, Susan, Alice, April, Chris, Carlo, Cathy, Berit, Bobby, Brian, Katie, Kelly, Kevin, David, Diane, Donna, Garry, Lance, Leila, Tash, Joel, John, Lori, Ana, Ann, Amy, Ben, Bob, Ron, Roz, Jim, Tom, Tim, Leigh, Ian, Mark, Mike, Scot, Alex, Becc, Kate, Paul, Ryan, Gail, Lisa, Mary, and Linda