John Incent was born in Berkhamsted around 1480 and was the son of Katherine and Robert Incent. Robert was the Secretary to Cicely, Duchess of York, the last royal resident at Berkhamsted Castle, wife of the Duke of York and mother of two Kings of England: Edward IV and Richard III. The standing of the Incent family in the town is marked by two brass memorials to Robert and Katherine in St John's Chapel in St Peter's Church. According to the inscriptions, Robert died in 1485 of the Great Sweating Sickness: