Haynau, Julius Jakob, Baron von, a notorious Austrian general, born at Cassel, Germany; entered the army in 1801, and while holding a command during the Italian campaigns of 1848-49, crushed the revolt at Brescia with such brutal ferocity as to gain him the name of the “Hyæna of Brescia”; he was for a time dictator of Hungary, but his murderous cruelty towards the subjugate people became a European scandal and led to his removal; in London he was mobbed and narrowly escaped with his life (1786‒1853).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Haym, Rudolf * Hayti