Probably Ballabrew, a farm or estate.
Check "A Manx notebook" There is a section on Manx Emigration and the mormons. At the bottom there is a reference to "The Kellys of Nallabrew Braddan' by N. Crowe IOMF History Society Vol 3#4 1981 pp 66/74.
Click on this and you will get some history going back into the 16th century.