Sligo and had their chief seat at
Ballymote in the center of that county. The OCrowleys (OCruadhlaoich) are also
a branch of the MacDermots of Moylurg in County Roscommon, Connacht. They settled in
County Cork as fighting men, or gallowglasses, to the MacCarthys.
The MacCarthys were the leading family of the Eoghanacht and were thus
the chief family of the Cork-Kerry area. Gallowglasses, being heavily armed soldiers (as
opposed to kerns, the lightly armed and armored soldiers from the clan-lands, whose usual
occupation was farming), were commonly imported as chiefs bodyguards (and to provide
a nucleus of professional soldiers), especially from the western Highlands of Scotland
(the name gallowglass means "foreign youth").
The OMulvihills (O Maoilmhichil) are an early branch of the Siol
Muireadhaigh, being descended from Maolmhichil, chief of Siol Muireadhaigh in 866. They
were originally chiefs of the district of Corca Sheachlainn in the east of County
Roscommon, but lost power at some time prior to the fifteenth century, though they
remained common in the area. Branches settled in counties Clare and Galway in the
sixteenth century, where they are known as Mulville or Melville. The ODuigenans (O
Duibhgeannain) were a distinguished literary family seated at Kilronan, County Roscommon.
They were hereditary chroniclers or historians to their MacDermot kinsmen, and also to the
OFarrells and MacRannells.
Finally among the Siol Muireadhaigh were the Muintear Rodhuibh, or
MacGeraghtys (Mag Oireachtaigh)