The Glynnes claimed descent from a semi-mythical ninth century chieftain, and were settled at Glynllivon, four miles south of Caernarvon, by the thirteenth century. They remained loyal to the English Crown during Glyndŵr’s revolt, and, following marriages into the English settler families of Bulkeley and Puleston, adopted the surname Glynne early in the sixteenth century. However, they did not forsake their Welsh heritage, remaining patrons of bardic culture until the early Stuart period.
Glynne made a brief appearance at Court in June 1617, when it was reported that Rowland Whyte, a former constable of Caernarvon Castle, hoped to place him in the household of the new favourite, George Villiers, earl of Buckingham. The latter’s journey to Scotland with the king meant that these plans came to nothing, and Glynne probably returned to Wales long before his father’s death in 1620.
Glynne’s relations with the Wynns remained sour over the next few years. William Wynn* secured his removal from the subsidy commission in the summer of 1621, while in January 1623 the Wynns complained to the Privy Council that Glynne, as sheriff, had interfered with their collection of the Palatine Benevolence in the Conway valley during the previous year.
At the 1625 election Glynne was opposed for the county seat by Sir Peter Mutton*, chief justice of North Wales. Mutton had sat for the borough seat in 1624, and claimed that Glynne had assured him while at Westminster on that occasion ‘that if any of my friends had desired the place [i.e. the shire seat] for me he would have yielded with many protestations of his love and respect unto me’. Having taken a casual pleasantry at face value, Mutton then compounded his error by approaching Sir John Wynn for support before assuring himself of Glynne’s willingness to stand aside, a miscalculation which was sure to raise the hackles of the Llŷn faction, who undertook to fight for the seat ‘might and main’. Glynne almost won the election by default on 13 Apr., when he appeared at the county court with the sheriff, ‘and might have carried it with the voice of 20 men without any opposition’ but for the fact that the writ did not arrive until the following day. Wynn’s support for Mutton cooled in the aftermath of this blunder, and it is likely that Glynne faced only a token opposition on the day of the election, although, in the words of a Wynn supporter, he and his Llŷn allies still ‘laboured as if it had been to obtain a great prize’.
Glynne voluntarily stood aside to allow John Griffith III a clear run at the county seat in 1626, his name appearing second on the indenture returning his ally, and Griffith probably sought to return the favour by lobbing to have Glynne excused from payment of a Privy Seal loan of £20 a few months later.
Glynne contested both the county and borough seats for the Long Parliament elections, but was frustrated by his erstwhile ally, John Griffith III. A reluctant royalist during the Civil War, Glynne was briefly detained on suspicion of parliamentarian sympathies at some point early in the conflict, although by 1644 he was serving the royalist cause locally as a militia colonel. He swiftly changed sides when parliamentarian forces invaded the county in the spring of 1646, and the assistance he rendered during the siege of Conway led to his being made governor of Caernarvon by Parliament in June 1646.
