Patrick Sullivan was a son of Patrick Sullivan and Mary Sullivan of Ardnacloghy, Bantry
Kate Manning was a daughter of Cornelius Manning and Margaret Cronin of Laharn, Bantry

Patrick Sullivan known as Pádraig Óg and Kate Manning married about 1878 (record not located).

Children born in Dromduff on dates shown in Civil Birth Register include:

Mary Sullivan, baptised Bantry Parish 28 Dec 1878

Denis Sullivan, 15 Oct 1880

Cornelius Sullivan, 13 Sep 1882

Catherine Sullivan, 1 Sep 1884

Patrick Sullivan, 25 Apr 1886

Jeremiah Sullivan, 20 Dec 1888

Ellen Sullivan, 4 July 1893

Honora Sullivan, 8 Apr 1895

Census 1901:
http://www.census.nationalarchives.ie/pages/1901/Cork/Glengarriff/Dromduff_West/1092990/

Census 1911:
http://www.census.nationalarchives.ie/pages/1911/Cork/Glengarriff/Dromduff_West/376247/

Deaths:
Patrick J O'Sullivan died at Dromduff on 23 October 1928.  From his death record he was married, aged 63 years, a farmer.  Present at his death and the Informant to the Registrar was his son, Denis of Dromduff.
Kate Sullivan died at Dromduff on 4 September 1932.  From her death record he was a widow, aged 73 years.  Present at her death and the Informant to the Registrar was her son, Denis Sullivan of Dromduff.