Rogan

Rogan, as an Irish surname, is derived from the Gaelic Ó Ruadhagáin 'descendant of Ruadhagán' (a diminutive of ruadh, meaning 'red'). The surname Rogan also occurs in other languages, for instance in South Slavic contexts, where it is derived from rog, 'horn' - among Serbo-Croatian speakers it is more common among Croatians than among Serbs, and it also exists among Slovenians.