| 651 | unknown | Vittoria Alliata di Villafranca | Alliata (House of) | 🇮🇹IT | | Francesco Alliata, 14th Prince of Villafranca | 0 ch. | 76 |
| 652 | Prince of Hohenzollernc | Karl Friedrich von HohenzollernPrince of Hohenzollern (c) | Hohenzollern-Sigmaringen (House of) | 🇩🇪DE | | unknown | 4 ch.Children (no sourced line of succession) | 74 |
| 653 | unknown | Ugo Moncada Verde | Moncada di Paternò (House of) | 🇮🇹IT | | Francesco Rodrigo Moncada di Paternò | 0 ch. | ~73 |
| 654 | unknown | Aymar d'Humières | Humières family | 🇫🇷FR | | unknown | 0 ch. | 72 |
| 655 | unknown | Ketevan Bagration of Mukhrani | Bagrationi dynasty | 🇫🇷FR | | unknown | 0 ch. | 72 |
| 656 | Prince of Leiningenc | Andreas, 8th Prince of LeiningenPrince of Leiningen (c) | not recorded | 🇩🇪DE | | unknown | 3 ch.Children (no sourced line of succession) | 70 |
| 657 | unknown | Piotr Dmitrijevitch Galitzine, Prince Galitzine | Galitzine | — | | Dmitry Golitsyn | 6 ch.Children (no sourced line of succession) | 71 |
| 658 | unknown | Jacob Wallenberg | Wallenberg family | 🇸🇪SE | | unknown | 1 ch.Children (no sourced line of succession) | 70 |
| 659 | unknown | Karl Eugen Graf Czernin von und zu Chudenic | Czernin (House of) | 🇦🇹AT | | unknown | 3 ch.Children (no sourced line of succession) | 70 |
| 660 | unknown | Eszter Bánffy | Bánffy (House of) | 🇭🇺HU | | unknown | 0 ch. | 69 |
| 661 | Ladyc | Lady Amanda EllingworthLady (c) | Mountbatten family | 🇬🇧GB | | unknown | 3 ch.Children (no sourced line of succession) | 69 |
| 662 | Ladyc | Lady Jane FellowesLady (c) | Spencer (House of) | 🇬🇧GB | | John Spencer, 8th Earl Spencer | 3 ch.Children (no sourced line of succession) | 69 |
| 663 | Ladyc | Lady Henrietta Spencer-ChurchillLady (c) | Spencer (House of) | 🇬🇧GB | | John Spencer-Churchill, 11th Duke of Marlborough | 2 ch.Children (no sourced line of succession) | 68 |
| 664 | unknown | Alexander Shervashidze | Shervashidze | 🇬🇪GE+1 | | unknown | 0 ch. | ~67 |
| 665 | Marchionessc | Clare Mountbatten, Marchioness of Milford HavenMarchioness (c) | Mountbatten family | 🇺🇸US+1 | | unknown | 3 ch.Children (no sourced line of succession) | 66 |
| 666 | Marquess of Milford Havenc | George Mountbatten, 4th Marquess of Milford HavenMarquess of Milford Haven (c) | Mountbatten family | 🇬🇧GB | | David Mountbatten, 3rd Marquess of Milford Haven | 2 ch.Children (no sourced line of succession) | 65 |
| 667 | unknown | Ilham Aliyev | Aliyev family | 🇸🇺SU+1 | | unknown | 3 ch.Children (no sourced line of succession) | 64 |
| 668 | unknown | Ivan Illarionovich Golitsyn | Galitzine | — | | Illarion Golitsyn | 0 ch. | 64 |
| 669 | unknown | Philip Knatchbull | Mountbatten family | 🇬🇧GB | | unknown | 4 ch.Children (no sourced line of succession) | 64 |
| 670 | Marchionessc | Sarah WalkerMarchioness (c) | Mountbatten family | 🇬🇧GB | | unknown | 2 ch.Children (no sourced line of succession) | 64 |
| 671 | Barónc | Pocholo Martínez-BordiúBarón (c) | Luna (House of) | 🇪🇸ES | | unknown | 0 ch. | 64 |
| 672 | Prince of Urachc | Prince Inigo of UrachPrince of Urach (c) | Urach (House of) | — | | Prince Eberhard of Urach | 3 ch.Children (no sourced line of succession) | 64 |
| 673 | Princessc | Princess Blanche d'OrléansPrincess (c) | Orléans (House of) | 🇫🇷FR | | Henri, Count of Paris | 0 ch. | 64 |
| 674 | unknown | Tomáš Czernin | Czernin (House of) | 🇨🇿CZ+1 | | unknown | 0 ch. | 64 |
| 675 | unknown | Victoire de Castellane | Castellane (House of) | 🇫🇷FR | | Antoine de Castellane | 0 ch. | 64 |
| 676 | unknown | Boris Mestchersky | Meshchersky | 🇧🇪BE | | Vera Meshcherskaya | 0 ch. | 63 |
| 677 | Lordc | Lord Ivar MountbattenLord (c) | Mountbatten family | 🇬🇧GB | | David Mountbatten, 3rd Marquess of Milford Haven | 3 ch.Children (no sourced line of succession) | 63 |
| 678 | Princess of Tarnovoc | Princess Miriam GhaziPrincess of Tarnovo (c) | Saxe-Coburg and Gotha-Koháry (Bulgaria) (House of) | 🇪🇸ES | | unknown | 2 ch.Children (no sourced line of succession) | 63 |
| 679 | Duchess of Arenbergc | Princess Silvia d’Arenberg, Duchess of ArenbergDuchess of Arenberg (c) | Castellane (House of) | — | | Henri-Jean de Castellane | 0 ch. | 63 |
| 680 | unknown | Tõnu Trubetsky | Trubetskoy family | 🇪🇪EE | | Jan Trubecki | 1 ch.Children (no sourced line of succession) | 63 |
| 681 | Earl Spencerc | Charles Spencer, 9th Earl SpencerEarl Spencer (c) | Spencer (House of) | 🇬🇧GB | | John Spencer, 8th Earl Spencer | 7 ch.Children (no sourced line of succession) | 62 |
| 682 | unknown | Ekaterina Golitsyna | Galitzine | — | | Andrey Golitsyn | 0 ch. | 62 |
| 683 | Prince of Moroccoc | Prince Moulay Hicham of MoroccoPrince of Morocco (c) | 'Alawi dynasty | 🇲🇦MA | | Prince Moulay Abdallah of Morocco | 0 ch. | 62 |
| 684 | unknown | Timothy Knatchbull | Mountbatten family | 🇬🇧GB | | unknown | 5 ch.Children (no sourced line of succession) | 61 |
| 685 | unknown | Uta Maria König | Hohenzollern-Sigmaringen (House of) | 🇩🇪DE | | unknown | 2 ch.Children (no sourced line of succession) | 62 |
| 686 | unknown | Árpád von Klimó | Árpád dynasty | 🇩🇪DE | | unknown | 0 ch. | ~62 |
| 687 | unknown | Cynthia von Buhler | Sforza (House of) | 🇺🇸US | | unknown | 0 ch. | ~61 |
| 688 | unknown | Ferdinand Castell-Castell | not recorded | 🇩🇪DE | | unknown | 3 ch.Children (no sourced line of succession) | 61 |
| 689 | Ladyc | Penny MountbattenLady (c) | Mountbatten family | 🇬🇧GB | | unknown | 3 ch.Children (no sourced line of succession) | 60 |
| 690 | unknown | Emilio Azcárraga Jean | Azagra family | 🇲🇽MX | | unknown | 0 ch. | 58 |
| 691 | unknown | Marina Dmitrievna Galitzine | Galitzine | — | | unknown | 0 ch. | 58 |
| 692 | Prince of Sayn-Wittgenstein-Berleburgc | Gustav, 7th Prince of Sayn-Wittgenstein-BerleburgPrince of Sayn-Wittgenstein-Berleburg (c) | Sayn-Wittgenstein-Berleburg (House of) | 🇩🇪DE | | unknown | 2 ch.Children (no sourced line of succession) | 57 |
| 693 | Prinz zu Bentheim-Tecklenburgc | Maximilian Nicolaus Moritz-Casimir Prinz zu Bentheim-TecklenburgPrinz zu Bentheim-Tecklenburg (c) | not recorded | 🇩🇪DE | | unknown | 4 ch.Children (no sourced line of succession) | 57 |
| 694 | Prince of Isenburgc | Prince Alexander, 10th Prince of IsenburgPrince of Isenburg (c) | not recorded | — | | unknown | 3 ch.Children (no sourced line of succession) | 57 |
| 695 | Ladyc | Rebecca WhartonLady (c) | Courtenay (House of) | 🇬🇧GB | | Hugh Courtenay, 18th Earl of Devon | 3 ch.Children (no sourced line of succession) | 57 |
| 696 | unknown | Catherine FitzGerald | FitzGerald (House of) | — | | Desmond FitzGerald, 29th Knight of Glin | 3 ch.Children (no sourced line of succession) | 55 |
| 697 | Ladyc | Lady Eleonora CourtenayLady (c) | Courtenay (House of) | 🇬🇧GB | | Hugh Courtenay, 18th Earl of Devon | 0 ch. | 55 |
| 698 | unknown | Maja Synke Meinert | Hohenzollern-Sigmaringen (House of) | 🇩🇪DE | | unknown | 0 ch. | 55 |
| 699 | Princec | Irakli Bagrationi-MukhraneliPrince (c) | Bagrationi dynasty | — | | unknown | 0 ch. | 54 |
| 700 | Princess of Wiedc | Isabelle, Princess of WiedPrincess of Wied (c) | Isnardi (House of) | — | | unknown | 3 ch.Children (no sourced line of succession) | 53 |