Regicides, murderers of a king, but specially applied to the 67 members of the court who tried and condemned Charles I. of England, amongst whom were Cromwell, Bradshaw, Ireton, and others, of whom 10 living at the time of the Restoration were executed, and 25 others imprisoned for life.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Reggio * Regillus, Lake