| Language(s) | Irish | 
|---|---|
| Origin | |
| Region of origin | Iveagh in County Down; Counties Armagh, Monaghan, Louth | 
| Other names | |
| Variant form(s) | O'Rogan | 
Rogan is an Irish surname, deriving from the Gaelic Ó Ruadhagáin 'descendant of Ruadhagán' (a diminutive of ruadh, meaning 'red').