1570 – 21 June 1600) was an English Roman Catholic layman who was executed during the reign of Elizabeth I.

Sir Edmund sent him to the sessions house of the Old Bailey to plead illness for the absence of his daughter, the widow Mrs. Fortescue, who had been summoned on a charge of recusancy.

The next day, the feast day of St Valentine, he signed a confession saying that since he had been reconciled to the Roman Catholic faith by Saint John Jones, a Franciscan priest, in the Clink some two or three years previously, he had not attended Anglican services.

He gave the executioner who helped him up to the cart a piece of gold, saying, "Take this in token that I freely forgive thee and others that have been accessory to my death.

"[3] Rigby was hanged, drawn and quartered at St Thomas Waterings on 21 June 1600.