Catesby, Robert, born in Northamptonshire, a Catholic of good birth; concerned in the famous Gunpowder Plot; shot dead three days after its discovery by officers sent to arrest him (1573‒1605).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Catesby, Mark * Cath`ari, or Catharists