Original: The name Hornsby is derived from Convict-turned-Constable Samuel Henry Horne, who took part in the apprehension of bushrangers Dalton and MacNamara on June 22, 1830.
Simplified: The name 'Hornsby' comes from a convict who became a constable. His name was Samuel Henry Horne, and he was given some land for helping catch two bushrangers, whose names were Dalton and MacNamara.