 Sir Thomas was the son of John Dingley of Boston, Lincolnshire and his wife, Mabel, daughter of Edmund Weston.He was included in a bill of attainder passed under Henry VIII of England; another person on the same bill was Margaret Pole, Countess of Salisbury.He was accused, together with Robert Granceter, merchant, of "going to several foreign princes and persuading them to make war with the King".