Margrave of Austria from 1095 to 1136. Patron Saint of Austria, Lower Austria, Upper Austria, and Vienna. Feast day is November 15
Member of the House of Babenberg. Son of Margrave Leopold II and Ida of Formbach-Ratelnberg. Married to Agnes of Germany (daughter of Henry IV, Holy Roman Emperor). This was the second marriage for both Leopold III and Agnes of Germany. Reportedly had 17 children, including Leopold IV (Margrave of Austria and Duke of Bavaria as Leopold I) and Henry II Jasomirgott (Duke of Austria).
His Y-DNA STR profile was obtained through DNA testing of his remains in 2013. This DNA analysis was conducted to determine if Leopold III’s oldest son, Adalbert (who was ignored in the line of succession), was Leopold III’s son from his first marriage or Agnes’s biological son from Leopold III’s second marriage.