Almost eighty per cent of the SULLIVANs / O'SULLIVANS in Ireland today belong to the counties of Cork and Kerry, They became very numerous and powerful, dividing into a number of branch septs of which O'Sullivan Mor and O'Sullivan Beare were the most important. The former had his principal castle at Dunkerron on the shore of Kenmare Bay, the latter was lord of the modern baronies of Beare and Bantry. Donal O'Sullivan Beare (1560-1618), hero of the siege of Dunboy was famous for his hazardous march to Ulster after the disasters of the Battle of Kinsale and the capture of Dunbly (see also LOWNEY). His nephew, Philip O'Sullivan Beare (1590-1660), was a soldier in the Spanish army, but is better known as a historian: his Historiae Catholicae Iberniae Compendium recounts the events of the Elizabethan wars as told to him by his uncle and other participants.
1. The SULLIVAN / O'SULLIVAN (Beare) Family of Felane, Castletownbere
Head of the family is John SULLIVAN (1806-70, possibly s/o Michael SULLIVAN) & Mary SHEEHAN (1810-1878, possibly d/o Timothy SHEEHAN) of Ballusky & Ardnasciach / Ardnaskeagh in Felane West, a township east of Castletownbere, who married in January 1834. Their known children:
2. The SULLIVAN / O'SULLIVAN Family of Whiddy Island, Bantry Bay
The son of above couple, John (Jack) LOWNEY, a coachbuilder and carpenter of Clonakilty, Co. Cork = Ellen SULLIVAN (1862-1934 d/o Daniel SULLIVAN) of Whiddy Island, Bantry Bay in 1890. Her mother’s name is not given on her marriage record and baptismal records are inconclusive. Despite numerous SULLIVANs in the 1901 Irish census on Whiddy Island there is no matching Daniel (who witnessed the marriage in 1890 and presumably deceased).
There are few specific references to SULLIVANs on Whiddy Island in Bantry records – only 4 marriages, no baptisms:
3. The SULLIVAN / O'SULLIVAN Family of Ardfield & Rathbarry / Rosscarbery, County Cork
Abigail SULLIVAN (bef 1791) = Daniel BRIEN sometime before 1809 in Cork, Ireland:
only known child Johanna
Ardfield & Rathbarry) = Jeremiah
outline above is indicative only and not necessarily fully correct