My grandfather John Regan's mother was a Mary Hourihane from Cork. A Hourihane from Ireland told me that the Hourihanes came from 3 townlands. Knockavoher(Kilmacabea parish), *Tullig (possibly Kilmacabea parish) and
Corran. "Corran" from Dunderrow parish, "Corran Beg" from Kilmoe parish and "Corran Middle" from Kilmacabea parish.
*Tullig is also in 6 other parishes; Bregoge, Kilerohane, Whitechurch, Drishane, Kilmaloda and Durrus. Keep these parishes in mind when you do your searches.
I have not proven that these townlands are correct. However, I did find a Tim Hourihane in Griffith's Valuation in Kilmacabea parish, location Corran North.