Wyvell’s ancestry was probably comparatively humble, since he traced his pedigree back only to his grandfather, a resident of Crediton, Devon. His father, Oliver, settled near the Cornish border at Marystow, where Wyvell himself was born. Having evidently received some legal training, Wyvell was a Common Law attorney by 1595. He married into a Cornish family, and by 1579 was living near Saltash, where Richard Carew† noted his house, ‘newly and fairly builded’.
Wyvell no doubt owed his election at Saltash in 1604 to his local standing. He would in any case have been in London that spring, as, perhaps serving as under-sheriff again, he had taken responsibility for passing in the Exchequer Cornwall’s shrieval accounts for 1602-3. Accordingly, on 4 Apr. he obtained permission to absent himself from the Commons until he had completed this task. Once back in the House he received three committee nominations, for bills concerned with the pilchard trade, a major West Country issue (20 June), Common Law attorneys (22 June), and letters patents (5 July). However, he made no visible impression on proceedings during the remaining four sessions.
By 1607 Wyvell had become deputy steward of Trematon honour and manor, which abutted Saltash. His behaviour while presiding over the manorial court twice led to complaints of partiality and corruption being brought against him in Star Chamber. Despite this, he was appointed to the Cornish bench in 1620, and served as county sheriff five years later, in which capacity he oversaw the Cornish parliamentary elections of 1626. At about the same time, he refused to pay a £30 Privy Seal loan on account of the financial burden imposed on him by the shrievalty.
According to one of his servants, Wyvell was now ‘very aged and many times before his death very weak and infirm of body and ... unable to travel about his own affairs’. His shaky signature on a lawsuit in June 1631 certainly suggests physical frailty.
