| 601 | Principality of Ponte Corvoc | Joachim, Prince of PontecorvoPrincipality of Ponte Corvo (c) | Murat (House of) | 🇫🇷FR | | Joachim, 8th Prince Murat | 0 ch. | 53 |
| 602 | unknown | Sarah Lavoine | Poniatowski (House of) | 🇫🇷FR | | unknown | 0 ch. | 53 |
| 603 | unknown | Tamara Czartoryska | Czartoryski (House of) | 🇪🇸ES | | Adam Karol Czartoryski | 0 ch. | 48 |
| 604 | unknown | Melanie-Yolande de Ligne | Ligne (House of) | — | | unknown | 1 ch.Children (no sourced line of succession) | 47 |
| 605 | unknown | Princess Barbara Czartoryska | Czartoryski (House of) | — | | Prince Albrecht Czartoryski | 0 ch. | 45 |
| 606 | unknown | Princess Yasmine Murat, Princess Murat | Murat (House of) | 🇫🇷FR | | unknown | 0 ch. | 44 |
| 607 | unknown | Anna Czartoryska | Czartoryski (House of) | 🇵🇱PL | | Stanisław Czartoryski | 0 ch. | 42 |
| 608 | unknown | Prince Witold Czartoryski | Czartoryski (House of) | — | | Prince Albrecht Czartoryski | 0 ch. | 41 |
| 609 | unknown | Louis-Henri de La Rochefoucauld | La Rochefoucauld (House of) | 🇫🇷FR | | Philippe de La Rochefoucauld | 0 ch. | 41 |
| 610 | unknown | Comte Pierre-Etienne de la Rochefoucauld | La Rochefoucauld (House of) | — | | Thierry de la Rochefoucauld | 0 ch. | ~40 |
| 611 | Countess of Riclac | Ana de Medina y Orléans-Bragança, 17th Countess of RiclaCountess of Ricla (c) | Medinaceli (House of) | — | | unknown | 0 ch. | 38 |
| 612 | Hereditary Prince of Lignec | Henri Antoine, Hereditary Prince of LigneHereditary Prince of Ligne (c) | Ligne (House of) | 🇧🇷BR | | Michel, Prince of Ligne | 0 ch. | 37 |
| 613 | unknown | Charlotte Gräfin von Ledebur-Wicheln | Ledebur-Wicheln | — | | Franz Graf von Ledebur-Wicheln | 3 ch.Children (no sourced line of succession) | ~113 |
| 614 | unknown | Włodzimierz Trubecki | Trubetskoy family | — | | unknown | 1 ch.Children (no sourced line of succession) | 111 |
| 615 | unknown | Nora Shervashidze | Shervashidze | — | | Q132187668 | 1 ch.Children (no sourced line of succession) | ~99 |
| 616 | Ladyc | Lady Rosemary Spencer-ChurchillLady (c) | Spencer (House of) | 🇬🇧GB | | John Spencer-Churchill, 10th Duke of Marlborough | 3 ch.Children (no sourced line of succession) | 97 |
| 617 | unknown | Vera Meshcherskaya | Meshchersky | — | | Nikita Meshchersky | 1 ch.Children (no sourced line of succession) | 96 |
| 618 | unknown | Pyotr Sheremetev | Sheremetev family | 🇫🇷FR+1 | | unknown | 0 ch. | 95 |
| 619 | Countess of Schönborn-Buchheimc | Princess Isabelle d'Orléans, Countess of Schönborn-BuchheimCountess of Schönborn-Buchheim (c) | Orléans (House of) | 🇧🇪BE | | Henri, Count of Paris | 5 ch.Children (no sourced line of succession) | 94 |
| 620 | unknown | François de Wissocq |  | 🇫🇷FR | | unknown | 0 ch. | 93 |
| 621 | unknown | Pauline Cheremeteff-de Mazières | Sheremetev family | 🇫🇷FR | | unknown | 0 ch. | 92 |
| 622 | unknown | Skënder Zogu | Zogu (House of) | 🇨🇭CH | | Prince Xhelal Zogu | 1 ch.Children (no sourced line of succession) | 93 |
| 623 | Comtesse de Limburgc | Princess Hélène d'OrléansComtesse de Limburg (c) | Orléans (House of) | 🇫🇷FR+2 | | Henri, Count of Paris | 4 ch.Children (no sourced line of succession) | 92 |
| 624 | unknown | Aleksander Hauke-Ligowski | Hauke (House of) | — | | unknown | 0 ch. | 90 |
| 625 | Prince of Ysenburg and Büdingenc | Wolfgang-Ernst, Prince of Ysenburg and BüdingenPrince of Ysenburg and Büdingen (c) | not recorded | 🇩🇪DE | | unknown | 3 ch.Children (no sourced line of succession) | 90 |
| 626 | Marchionessc | Janet BryceMarchioness (c) | Mountbatten family | 🇬🇧GB | | unknown | 2 ch.Children (no sourced line of succession) | 89 |
| 627 | unknown | Lalla Lamia Al Solh | 'Alawi dynasty | 🇱🇧LB | | unknown | 2 ch.Children (no sourced line of succession) | 89 |
| 628 | unknown | Vladimir Golitsyn | Galitzine | 🇸🇺SU+1 | | Aleksandr Golitsyn | 0 ch. | 89 |
| 629 | unknown | Dimitri Sturdza | Sturdza (House of) | 🇷🇴RO+1 | | unknown | 0 ch. | 88 |
| 630 | unknown | Jan Trubecki | Trubetskoy family | — | | Włodzimierz Trubecki | 1 ch.Children (no sourced line of succession) | 87 |
| 631 | unknown | Archduchess Elisabeth of Austria (1939) | Habsburg-Tuscany (House of) | — | | Archduke Gottfried of Austria | 3 ch.Children (no sourced line of succession) | 87 |
| 632 | FitzGerald baronets of Valentia (1880)c | Adrian FitzGeraldFitzGerald baronets of Valentia (1880) (c) | FitzGerald (House of) | 🇬🇧GB | | unknown | 0 ch. | 86 |
| 633 | unknown | Countess Maria Sidonia Czerin | Czernin (House of) | — | | unknown | 2 ch.Children (no sourced line of succession) | ~86 |
| 634 | Archduchess of Austriac | Archduchess Alice of AustriaArchduchess of Austria (c) | Habsburg-Tuscany (House of) | — | | Archduke Gottfried of Austria | 2 ch.Children (no sourced line of succession) | 85 |
| 635 | unknown | János Nyáry | Nyáry (House of) | 🇭🇺HU | | unknown | 0 ch. | 84 |
| 636 | Count of Skenninge and Stjernorpc | Count Axel Douglas, 15th Count of Skenninge and StjernorpCount of Skenninge and Stjernorp (c) | Clan Douglas | 🇩🇪DE+1 | | unknown | 1 ch.Children (no sourced line of succession) | 83 |
| 637 | unknown | Isabelle Allard | Grailly (House of) | 🇫🇷FR | | unknown | 1 ch.Children (no sourced line of succession) | 82 |
| 638 | unknown | Grigory Gagarin | Gagarin family | 🇷🇺RU | | Grigory Gagarin | 0 ch. | 81 |
| 639 | Archdukec | Markus Habsburg-LothringenArchduke (c) | Habsburg-Tuscany (House of) | — | | unknown | 3 ch.Children (no sourced line of succession) | 80 |
| 640 | unknown | Princess Chantal d'Orléans | Orléans (House of) | 🇫🇷FR | | Henri, Count of Paris | 3 ch.Children (no sourced line of succession) | 80 |
| 641 | unknown | Aleksandr Trubetskoy | Trubetskoy family | 🇫🇷FR | | unknown | 0 ch. | 79 |
| 642 | unknown | Marcin Zamoyski | Zamoyski family | 🇵🇱PL | | Jan Tomasz Zamoyski | 0 ch. | 79 |
| 643 | unknown | Mariam de Bagration | Bagrationi dynasty | 🇪🇸ES | | unknown | 2 ch.Children (no sourced line of succession) | 79 |
| 644 | Earl Mountbatten of Burmac | Norton Knatchbull, 3rd Earl Mountbatten of BurmaEarl Mountbatten of Burma (c) | Mountbatten family | 🇬🇧GB | | unknown | 3 ch.Children (no sourced line of succession) | 79 |
| 645 | unknown | Șerban Sturdza | Sturdza (House of) | 🇷🇴RO | | unknown | 0 ch. | 79 |
| 646 | unknown | Alexander Golitzin | Galitzine | 🇺🇸US | | unknown | 0 ch. | 78 |
| 647 | unknown | David Bagrationi | Bagrationi dynasty | — | | unknown | 1 ch.Children (no sourced line of succession) | ~78 |
| 648 | Princec | Prince Juan Alberto Padilla de BourbonPrince (c) | Spanish Royal Family | 🇪🇸ES | | unknown | 0 ch. | 78 |
| 649 | unknown | Adam Zamoyski | Zamoyski family | 🇵🇱PL+2 | | unknown | 0 ch. | 77 |
| 650 | unknown | Amelie Prinzessin von Urach | Urach (House of) | — | | Prince Eberhard of Urach | 8 ch.Children (no sourced line of succession) | 77 |