known as Ferdinand the Great. ?1016--65, king of Castile (1035--65) and León (1037--65): achieved control of the Moorish kings of Saragossa, Seville, and Toledo
2.
1503--64, king of Hungary and Bohemia (1526--64); Holy Roman Emperor (1558--64), bringing years of religious warfare to an end
3.
1751--1825, king of the Two Sicilies (1816--25); king of Naples (1759--1806; 1815--25), as Ferdinand IV, being dispossessed by Napoleon (1806--15)
4.
1793--1875, king of Hungary (1830--48) and emperor of Austria (1835--48); abdicated after the Revolution of 1848 in favour of his nephew, Franz Josef I
5.
1861--1948, ruling prince of Bulgaria (1887--1908) and tsar from 1908 until his abdication in 1918
6.
1865--1927, king of Romania (1914--27); sided with the Allies in World War I