Grian or Greaney is the name of a river, a lake, and region in the portion of the Sliabh Aughty mountains in County Clare

County Clare

-History:There was a Neolithic civilisation in the Clare area — the name of the peoples is unknown, but the Prehistoric peoples left evidence behind in the form of ancient dolmen; single-chamber megalithic tombs, usually consisting of three or more upright stones...

. It formed part of the boundary of the kingdom of Síol Anmchadha

Síol Anmchadha

Síol Anmchadha was a sub-kingdom or lordship of Hy-Many, and ruled by an off-shoot of the Ui Maine called the Síol Anmchadha , from whom the territory took its name....

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Grian (literally, "Sun") is also the name of an Irish figure, presumed to be a pre-Christian goddess, associated with County Limerick

County Limerick

It is thought that humans had established themselves in the Lough Gur area of the county as early as 3000 BC, while megalithic remains found at Duntryleague date back further to 3500 BC...

and Cnoc Greine ("Hill of Grian, Hill of the sun"), located seven miles from Knockainy.