Kingdom of Desmond

And a number of other O Sullivan baronial / manorial lordships, as follows:

• the other O Sullivan septs subordinate to O Sullivan Bere are:
• Sliocht Fineen Duff (survived at least into the 19th century);
• Sliocht Dowlinge;
• Sliocht Swleagwill; and
• the Sept of Ballaghbuy …
• plus the lands of freeholders in Bantry, etc., of which the Association at present knows nothing re any lineal descents.  

Additionally, O Sullivan Bere had as dependent a number of non O Sullivan clans:

O Linchigh (O Lynch), which was Gaelic and had nothing to do with the Norman-Irish Galway Lynches, and which was of the same Corca Laoighdhe roots as the O Driscolls.  

They were Lords of Kilcaskan and likewise lost all in the 17th century wars but continued on to include;

• Jack Lynch, Taoiseach of Ireland two times;   
• the families of O Holighan;
• O Donegan;  and
• the soldierly family of Harrington.

Harrington had a Chief-of-Name listed in 1576 but nothing survives as regards an hereditary descendant to claim the lordship / chiefship-of-name of any of those non O Sullivan families.
Finally, there was a branch of the Lyons family living as tributary to O Sullivan Bear, to include one from that medical family being the physician to Domhnall Cam in Spain in the early 17th century.

2. The Lordship of Clanlauras    

It became a major O Sullivan lordship as it had become virtually independent of  O Sullivan Mor and of claims by O Sullivan Bere (to whose territories it was contiguous);  but it was extinct by the late 16th  century – when it reverted directly to the then reigning MacCarthy Mor. 
However, the consensus is that this large former O Sullivan lordship, whatever the previous reversion directly to a MacCarthy Mor, should again be listed under the branches of the O Sullivans  – as stemming originally from the O Sullivans as an appanage and being a subordinate branch of that family, with note that Clanlauras itself became a comital / Ard Tiarna lordship.    

3. The Lordship of Doonebo

The current Lord of Doonebo lives on an estate in Lincolnshire, England and is a member of the Standing Council of Irish Chiefs.    He was educated in England 1948-57, Switzerland (1958), France (1962-63) and England again (1969-71).   He served as an officer in the Irish Guards;  and was later farming in the Province of Natal, South Africa.   After returning to Ireland from South Africa, he was living in MacGillycuddy Reeks Country (Baunclune / Whitefield), prior to his move to Lincolnshire.

4. The Lordship of Letter

This was the possession of the O Sullivan branch which became known as MacCrehan, and their major residence was at Letter, near Cahirciveen in County Kerry. The sept also had a manor at Magunihy. They are extinct by all knowledge to date.

5. The Lordship of Cappanacushy

This was the possession of what was originally the senior branch of the O Sullivans, who became known as MacCrah.    They are extinct to all knowledge to date.

6. Other Septs of the O Sullivans

(minor to 1 to 5 above) directly subordinate (baronial or manorial lordships) to O Sullivan Mor

There were at least eight, and these are:

• O Sullivan of Cumurhagh; 
• O Sullivan of Glenbeigh;
• O Sullivan of Caneah and Glanarcane;
• O Sullivan of Culemagort;
• O Sullivan of Cappanacuss;
• O Sullivan of Capiganine;
• O Sullivan of Fermoyle and Ballycarna; and
• O Sullivan of Ballyviegillaneulan.

None has been claimed by a lineal hereditary of any of those septs to the Association’s knowledge, though descendants continued in Counties Cork and Kerry after the end of the Gaelic order and confiscations.
Therefore, as with the principalities of Carbery and Muskerry of the MacCarthys, it is our belief that a lineal hereditary head for one or more of these O Sullivan subordinate septs possibly still exists! But much work must be done by current O Sullivans re tracing the ancestries / decendancies.
Note: re the O Sullivans, the above may not be entirely accurate, and the Association invites comments re revisions.