The Vaughans claimed descent from Bleddyn ap Cynfyn, an eleventh-century prince of Powys and founder of one of the royal tribes of Wales.
Sir John Vaughan’s early political career was associated closely with the fortunes of his father’s ally Robert Devereux, 2nd earl of Essex.
Vaughan does not appear to have sought election to the first Jacobean Parliament. As mayor of Carmarthen he was technically disqualified from standing for the borough, while the county seat was taken by Sir Robert Mansell. He busied himself instead in the county, purchasing land and helping secure a new charter for Carmarthen in 1604.
Vaughan and his relatives ran the lordship of Kidwelly as their own personal fiefdom, generating accusations that they extorted money from the inhabitants.
Vaughan’s local misdeeds were discounted because of preferment at Court, which he earned by assiduous courting of the king’s favourite, the earl of Somerset. In October 1614, while in London, Vaughan promised Somerset loyal service in return for the latter’s favours as an ‘intercessor’ with the king.
Vaughan’s election for Carmarthenshire in December 1620, after a hiatus of 20 years, may reflect encouragement from Prince Charles.
In 1623, when Charles journeyed to Spain to woo the Infanta, Vaughan assisted in the dispatch of the Prince’s retinue, which left Portsmouth on 23 March.
Vaughan’s failure to secure a fresh place at Court after Charles’s accession in March 1625 ended his hopes of advancement: in April a London correspondent noted that no-one now spoke favourably of him.
On 29 Apr. 1634 Vaughan made a nuncupative will ‘in the time of sickness whereof he died’, renouncing previous dowry provisions for his daughter Mary, recently married.
