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Oakley, 419

Oberlahngau - Counts, 314, 639

Oberrheingau - Counts, 723

OBOTRITES - Princes & Kings, 213, 511

O'BRIEN - Kings of Munster and Thomond, 123, 124, 133, 273, 274, 283, 284, 420, 511, 570

O'Brien Ara, 570

O'Byrne, 397

O'Callaghan, 570

O'Carroll, 132, 275

O'Cathan of Ulster, 366

Occimiano - Marcheses, 455

Ochiltree - Lairds of, 344

Ochterlony, 319

O'CONNOR - Kings of Connaught, Lords of Kerry, 122, 277, 512, 516

O'Connor Corcoran, 514

O'Connor of Derrymullen, 279

O'Cromin, 422

Odingsells - Lords of, 67, 87, 328

Odo, Bishop of Bayeux, 122, 190, 393

O'Donnell - Chiefs of Tirconnell, 515

O'Donoghue of Glenfisk, 421

O'Donoghue of Killarney, 513

Odorney - Barons, 283

OENINGEN - Counts, 231, 335, 525

Offaly - Barons, 274

O'Flaherty, 124

O'Fogarty, 512, 513

Ogento, 23

Ogiers, 62

Ogilvy - Baronets, 518

OGILVY - Barons, Earls of Airlie & Findlater, 118, 202, 319, 321, 325, 351, 405, 517

Ogilvy - Lairds of, 324

O'Grady, 658

Ogston, 4, 350

O'Hyne - Princes of Fiachra Aidhne, 512

OILLEY, 199, 429, 481, 525

Oisy - Seigneurs, 48, 73, 81, 86, 590

Okehampton - Lords of, 50, 194, 196

O'KENNEDY - Lords of Muscry Tire, 277, 422, 514, 520

Oldenburg - Counts, 509

O'Leary, 531

Olethan - Lords of, 56, 57

Oliphant, 117, 325, 375

Oliver Castle - Lairds of, 348

O'MAHONY (See under Munster, Kings), 422, 482, 520

Omayyid Caliphs, 478, 479

O'Mulloy, Lords of Fircall., 512

O'NEILL - Kings of Ailech, Brega, Meath and (Tara) Ireland, 275, 515, 520

ORANGE - Comtes & Princes (See also under Baux), 59, 60, 253, 526

Orbec - Seigneurs, 109, 178

Orchardfield - Lairds of, 343

Ordsal - Lords of, 228

O'Reilly, 132

Orescuitz, Lord of Cernecote, 345

Orford - Lords of, 677

Orgemont - Barons, 466

ORKNEY - Jarls, 270, 366, 469, 527

ORLAMUNDA - Counts, 528, 711

Orléans - Marquises, 302

Orléans - Merovingian Kings, 444

Orléans - Vicomtes & Ducs, 30, 159, 247, 253, 290, 297, 300, 301, 302, 303, 312, 352, 603, 696, 723, 724

Ormidale - Lairds of, 150

ORMONDE - Earls (See under Butler), 131, 222, 528

Ormonde - Marquesses, 614

ORONTID Dynasty (See under Armenia), 33

Orreby - Lords of, 539, 719

ORSEOLO (See under Venice), 144

ORSINI (See under Cephalonia and Epirus), 140, 147, 166, 256, 437, 438, 618

ORTENBERG - Counts, 499, 528, 631

Ortengen - Counts, 106, 653

Ortigen, 509

O'Ruairc, 425

Orval - Seigneurs, 8, 556

Osborne, 253

Osdola, 675

Osona - Condes, 54

Osrhoene - Kings, 537

Ossetia - Princes, 382, 699

OSSORY - Kings & Princes, 523, 528

Ossory - Lords of, 105

Ostervant - Counts, 13, 250, 305, 677, 692

Ostmark - Margraves, 604

OSTROGOTHS - Kings, 443, 529

Ostrowizza - Counts, 200

O'SULLIVAN MORE - Lords of Dunkerron, 421, 422, 483, 530

Oswestry - Lords of, 7, 100

O'TOOLE of Leinster, 531

Otter - Lairds of, 150

OTTOMAN Dynasty, 147, 148, 531

Ouest Rasen - Seigneurs, 535

Oughtred, 621

OUILLY (See under Oilley), 57, 429

OULTREJOURDAIN - Seigneurs, 534

Ourem - Counts, 559

Overburie, 379

Oviedo - Condes, 42, 490

Ovrutsch - Princes, 699

Owen, 88

Oxenbridge, 88

OXFORD - Earls (See under Vere), 235, 534

Oxnam - Lairds of, 379

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