At least one branch of John's own descendants was associated with Dublin, but they continued to play a prominent role in the political life of Carrickfergus until at least the 1730s.
The office of Third Serjeant was created especially for him in 1682: this was widely regarded as a "consolation prize" for his failure to secure a place on the Court of Common Pleas (Ireland).
The situation became comical when the office of Second Serjeant was given to William Beckett: both Lyndon and Sir Richard Ryves, the Recorder of Dublin, claimed that it had been promised to them.
The desire to conciliate Lyndon suggests that he was highly regarded by Ormonde, who was noted for loyalty to his friends.
He seems to have been in some financial difficulty at this time, as he petitioned the Crown for a licence to export wool, as a means of providing for his family.
Despite their differences Nugent and Lyndon, who had jointly presided at the trial for murder of William (or Henry) Aston, eldest son of their late colleague Sir William Aston, who was found guilty and hanged,[1] worked together to secure the return of his property, which was forfeit to the Crown, to his widow and children, who were living in poverty.
James's arrival in Ireland in 1689 put Lyndon and the other remaining Protestants on the Irish Bench in a very difficult position, as they were naturally suspected of sympathising with the new King William III.
Following the downfall of King James's cause at the Battle of the Boyne, Lyndon returned to Ireland, and was reappointed to the Bench in 1690 and knighted.
By his wife Elizabeth he had a numerous family, including at least five sons, John, Edward, Charles, Richard and George, and one daughter, who married her cousin Cuthbert Winder.