What is "dunderrow"

Dunderrow ( Irish: Dun Darú) is a small village in County Cork, Ireland located on the R605 Regional Road between Innishannon and Kinsale. It was originally founded by the the very respected O'Regan family and to this day their family still take up the majority of the population, even owning their own private road called 'Ballydaly'. Dunderrow signifies the fortress of the oak-plain, and the large dun from which it is called, half a mile south of the village. Dunderrow National School was built in 2000. Eli-Lilly factory is situated in Dunderrow and was built in 1976 on 112 acres of land.