Lothair II, Holy Roman Emperor

Lothair II or Lothair III , known as Lothair of Supplinburg, was Holy Roman Emperor from 1133 until his death. He was appointed Duke of Saxony in 1106 and elected King of Germany in 1125 before being crowned emperor in Rome. The son of the Saxon count Gebhard of Supplinburg, his reign was troubled by the constant intriguing of the Hohenstaufens, Duke Frederick II of Swabia and Duke Conrad of Franconia. He died while returning from a successful campaign against the Norman Kingdom of Sicily.

Little is known of Lothairs youth. He was a posthumous child, born at Unterl in 1075 shortly after his father, who had joined the Saxon Rebellion against the ruling Salian dynasty, died in the Battle of Langensalza onJune against troops loyal to Emperor Henry IV. In 1100 he married Richenza, daughter of Count Henry of Northeim and Gertrude of Brunswick, heiress of the Brunonids.

Source: Wikipedia