Enzio was thus accepted by the House of Reuss as a prince, but his own marriage to Baron Gustaf Peyron's daughter in 1949 occurred before the Reuss family conference of 1957 which lowered the marital standard again, allowing dynastic inter-marriage with baronial families. In 1992, Prince Heinrich Ruzzo of Reuss, Count of Plauen, a prince of the former sovereign House of Reuss, married Anni-Frid Lyngstad, a former lead singer of the popular 1970s Swedish musical group ABBA. Since her marriage to the prince, she has held the titles of Princess Reuss and Countess of Plauen with the style of Her Serene Highness. Heinrich Ruzzo died of lymphoma on October 29, 1999, leaving her the titles of Dowager Princess and Countess. She currently resides in Genolier in the Canton of Vaud, Switzerland. She has shared a home since 2020 with her British partner, Henry Smith, 5th Viscount Hambleden. Since 1999 the House of Reuss has recognized Prince Heinrich Ruzzo Reuss of Plauen, (German: Heinrich Ruzzo, Prinz Reuß von Plauen) by his official title. However, without official membership in the dynasty or entitlement to the traditional style of Serene Highness. However, under German law the title has only been allowed as part of the surname after 1919, thus the name "Heinrich Ruzzo Prinz Reuss." Princes of Reuss-Gera and Counts of Plauen Heinrich I, Count of Reuss-Schleiz 1666-1692 (1639-1692) Heinrich XI, Count of Reuss-Schleiz 1692-1726 (1669-1726) Heinrich I, Count of Reuss-Schleiz 1726-1744 (1695-1744) Heinrich XII, Count of Reuss-Schleiz 1744-1784 (1716-1784) Heinrich XLII, 1st Prince of Reuss-Schleiz 1784-1818 (1752-1818), raised to princly status in 1806 Heinrich LXII, 2nd Prince 1818-1854 (1785-1854) Heinrich LXVII, 3rd Prince 1854-1867 (1789-1867) Heinrich XIV, 4th Prince 1867-1913 (1832-1913) Heinrich XXVII, 1st Prince Reuss 1913-1928 (1858-1928), monarchy abolished in 1918, inherited Reuss-Greiz in 1927 Heinrich XLV, 2nd Prince Reuss 1928-1962 (1895-1962), went missing in 1945, declared dead in absentia in 1962 Heinrich XXIV, Count of Reuss-Köstritz 1692-1748 (1681-1748) Heinrich VI, Count of Reuss-Köstritz 1748-1783 (1707-1783) Heinrich XLIII, 1st Prince of Reuss-Köstritz 1783-1814 (1751-1814) Heinrich LXI, Hereditary Prince of Reuss-Köstritz (1784-1813) Heinrich LXIV, 2nd Prince of Reuss-Köstritz 1814-1856 (1787-1856) Heinrich XLVIII, Prince of Reuss-Köstritz (1759-1825) Heinrich LXIX, 3rd Prince of Reuss-Köstritz 1856-1878 (1792-1878) Heinrich IX, Prince of Reuss-Köstritz (1711-1780) Heinrich XLIV, Prince of Reuss-Köstritz (1753-1832) Heinrich LXIII, Prince of Reuss-Köstritz (1786-1841) Heinrich IV, 4th Prince of Reuss-Köstritz 1878-1894 (1821-1894) Henry XXIV, 5th Prince of Reuss-Köstritz 1894-1910 (1855-1910) Heinrich XXXIX, 6th Prince