Cognomen Eogan (Eogan 
) , throughout the world, is a very rare surname. The surname Eogan is characteristic of Ireland, where it is a rare surname, and the United States, where it is an extremely rare surname. Also, Eogan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Eogan | Ireland, United States |
| george eogan Irish archaeologist, IE (b. 1930) |
|
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| eogan i mac oililla |
|