Last name Swanagan (Swanagan 
) , worldwide, is a rare family name. The cognomen Swanagan is characteristic of Northern America, particularly the United States, where it is a very rare surname. Very seldom, Swanagan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Swanagan | United States |
| jeff swanagan American zookeeper (1957-2009) (b. 1957) |
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| harold swanagan college basketball player (1999–2002) Notre Dame |
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| brian scott swanagan Ph.D. University of Georgia 2012 |
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