List of Taoiseachs of O'Brien (OTL)

First Republic

 * Ceilidh Flora McTaggart-978.5-988.5.
 * Gaynor Izlith Rhyse-988.5-1003.5.
 * Eibhlín Éabha O'Brian-1003.5-1023.5.
 * Gaynor Maria Peth-1023.5-1029
 * Craig Henery Mackinlay- 1029

Second Republic

 * Michael Mc Namara 1034-1036
 * Eamon O'Ryan 1036-1046
 * Patrick Shannon 1046-1052
 * Lorcan McEvoy 1052-1053
 * Majella Mac Ateer 1053-1053.5
 * Maureen O'Reilly 1053.5-1055
 * Rory Lynch 1055-1056.5
 * Fergus Keogh 1056.5 - Present