Carthusian lay brother and martyr. A member of the London Charterhouse of the Carthusians, he was arrested for opposing the religious policies of King Henry VIII (r. 1509-1547), which included the imprisonment of Catholics and the destruction of monasteries. William was executed at Tyburn with two companions.
The Carthusian martyrs are those members of the Carthusian monastic order who have been persecuted and killed because of their Christian faith and their adherence to the Catholic religion. As an enclosed order the Carthusians do not, on principle, put forward causes for their members, though causes have been promoted by others on their behalf.
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