At this link, you can see more info about the townland of Garraveasoge (as it is now usually spelled), which in Irish is Garraí Féasóg, meaning “garden of beards”, possibly referring to the beard-like appearance of heads on growing wheat stalks:
I was intrigued by your inquiry, because one of my great-grandmothers, Elizabeth Cronin, was born in 1835 three townlands to the west of Garraveasoge, in the townland of Garranbaun. It's in a different civil parish (Kilmeen), but the same Catholic parish (Dromtarriffe). I don't know of any Kelleher, Linahan, or Corkery ancestors in my family, but if our great-grandparents lived that close to one another, then we're probably at least distantly related. The Cronin surname originated in that general area, and MacLysaght's Surnames of Ireland says that the Kellehers have been in the Cork/Kerry border area since the 14th century. He doesn't say where they came from, but gives Ó Céalachair ("descendant of the dear companion") as the original form of the surname. There were apparently at least two separate Lenihan/Linihan families, but MacLysaght says that the Limerick/Cork one had Ó Luingeachán as its Irish form (which could mean several different things). He also explains that virtually all Irish Corkery's (Ó Corcra in Irish) were from Cork, but the name has nothing to do with the name of the county. He says that it's based on the word corca, which means "purple" in Irish.
In case you're interested, the name of the Catholic parish, Dromtarriffe, is Drom Tarbh in Irish, meaning "bull ridge", and may refer to an ancient pagan ceremony where a bull calf was sacrificed on May 6th near a holy well still located in the parish.