Burriscarra is the name of a civil parish in County Mayo, about which you can see more info at this link, including a map:
https://www.townlands.ie/mayo/carra/burriscarra/burriscarra/burriscarra/
Within that civil parish are a number of townlands, which is the basic unit in addresses for rural areas. Rinaneel is one of those townlands, and you can see more info about it at this link, including a map:
https://www.townlands.ie/mayo/carra/burriscarra/burriscarra/rinaneel/
Just to the east of Rinaneel is a townland called Clooneenkillew, which may be what you were reading as Cloonkeil. You can see more info about Clooneenkillew at this link, including a map:
https://www.townlands.ie/mayo/carra/touaghty/burriscarra/clooneenkillew/
Civil parishes were a kind of administrative district, separate from the Catholic parishes, and they did not always share the same boundaries (or even the same name) as the Catholic parishes. The Catholic parish has the same name in this case, but is larger, and contains parts or all of several civil parishes. You can see the parish register for the Catholic parish of Burriscara at this link, and download any pages there which are of interest to you:
https://registers.nli.ie/parishes/1048