Namesakes
Karel II
(middle name Ignaz) (m) 1685-1740 
Bohemian Kings 1711-1740
Austrian Dukes and Emperors (Karl II) 1711-1740
German Kings and Holy Roman Emperors (Karl VI) 1711-1740
Hungarian Kings and Queens (Károly III) 1711-1740
Leopold IV
(middle name Ignaz) (m) 1640-1705
Austrian Dukes and Emperors 1657-1705
Bohemian Kings (Leopold I) 1656-1705
German Kings and Holy Roman Emperors (Leopold I) 1658-1705
Hungarian Kings and Queens (Lipót I) 1655-1705
Ignaz Semmelweis
(m) 1818-1865
Notable Scientists and Inventors
Josef I
(middle name Ignaz) (m) 1678-1711
Bohemian Kings 1705-1711
Austrian Dukes and Emperors (Joseph I) 1705-1711
German Kings and Holy Roman Emperors (Joseph I) 1690-1711
Hungarian Kings and Queens (József I) 1687-1711
Franz Joseph II, Prince of Liechtenstein
(middle name Ignaz) (m) 1906-1989
Other Royalty 1938-1989 Liechtenstein (prince)
Ignaz Seipel
(m) 1876-1932
Austrian Chancellors and Presidents 1922-1924; 1926-1929 (chancellor)
Ignaz von Rudhart
(m) 1790-1838
Greek Prime Ministers 1837
Ignaz Berndaner
(m) 1954-
Olympic Medalists 1976 ice hockey (bronze)