He was sued by James Butler in 1741. Equity Exchequer Bill 25 May 1741--James Butler v. Pierce Lynch & Francis Butler:
Suppliant, James Butler of Cahirbane, Co Clare, Esq, sheweth that being for over 3 years seised of the lands of Carheeny & Clonemahone in Barony of Kiltarton, Co Galway, he demised said lands to Pierce Lynch of Rathvilladown, Co Galway, gent, for 1 year from 1st May 1740 at £28 for the year. Said lands were so devised to Pierce Lynch in trust for Francis Butler of Cregg, Co Galway, gent. [his brother-in-law], who possessed said lands till first of present month. Pierce Lynch by Pro Note secured one year's rent to Suplt and accepted receipt for same from Suplt. The said year having expired, Suplt sent his bailiff, Patrick O'Shaughnessy, to take possession of said lands for Suplt, whose title is still in being. Now Lynch and Butler--particularly the latter--refuse to give up possession, and Butler employed his brother, Theobald, and other persons to detain the same from Suplt by force of arms. Begs writ of sub-poena directed to Defendants.

From Irish Roots, 1994 #1, "Surnames of County Galway" page 26:
The founding families of Galway City were the mainly Norman followers of the de Burgos in the invasion of Connacht in the early 13th century. . . With the passage of time they sought to cast aside the suzerainty of the de Burgos whom they saw as allying themselves with the native Irish and adopting Irish customs. The walls of Galway were fortifications against military assault and a protection against Irish ways around an English enclave. The year 1484 was one of great achievement for these families because then they gained, in both church and state affairs, a degree of independence which was unique. . . It was in response to the Cromwellians that the former ruling families of Galway adopted the description of 'Tribes.' The families in their pride, and often without heraldic authority, adopted coats of arms which were ostentatiously blazoned on their stone houses. Since then it has been accepted generally that there were in all 14 tribes in Galway. Those Tribal families held tenaciously to their privileges and even as the 19th century opened they asserted their right to elect the Catholic clergy of the city of Galway. The creation of the diocese of Galway in 1831 in effect extinguished this last power of the Tribes of Galway. The 14 tribes included:
Blake: motto: Virtue alone ennobles
Lynch: motto: Ever faithful
Undoubtedly the most important of the Tribes of Galway was the Lynch family.
They were certainly established in the city by the late 13th century and were trading with the port of Lubeck on the Baltic in 1415. Thomas Lynch (or de Lince), provost of Galway in 1274, is the earliest recorded chief magistrate of the city and from then onwards the Lynchs dominated city offices. They were deeply involved in winning the mayoralty status of Galway and the Collegiate independence of St Nicholas's Church in 1484. The first Mayor of Galway was Pyerse Lynch and 29 of the first 39 mayors came from the Lynch family. Within the city, the Lynch coat of arms decorates many of the buildings which the Lynchs did so much to beautify. The Lynch chapel in St Nicholas's bears their arms on the exterior and on the Lynch window and tomb. Lynch's Castle is the most elaborate old family residence in the city and was built about the year 1500. It is the oldest building in Ireland in daily commerce; in use as an office of Allied Irish Banks. The 17th century James Lynch whose school attracted hundred of students was a noted educationalist. The family spread through Connacht and descendants included the noted 19th century Mesopotamian explorers, Henry Blosse Lynch and his brother Thomas. At Bordeaux in France an emigre Lynch established the Lynch-Bajes vineyard. A Lynch signed the American Declaration of Independence. Perhaps it is a pity that the most famous Lynch story of all is a piece of fiction - that is the tale about the Mayor who hanged his own son. A monument to this non-event, the front wall of a house where it never happened, has for years been one of the most visited sites in the city.
There is a picture on page 27 of Lynch's Castle, the caption says: Lynch's Castle, built about 1500-it is the oldest building in Ireland in daily commercial use.

The family of: LYNCH of Galway, Ireland
Arms: Asure, a chevron between three Trefoils slipped.
Crest: a lynx passant asure, collared.
Motto: semper fidelis.
Authority: Burk's general armory, 1878 edition page 632.
Tinctures as shown by description:
The shield is of blue.
The chevron is of gold.
The trefoils are of gold.
The lynx is blue, collar is of blue and gold.
The wreath, under the crest, is of blue and gold.

Notes: according to the ancient manuscript in the office of Ulster, king of arms, Dublin castle, all the lines of Lynch of Ireland descended from William le Petit, an ancient Norman settler in Galway. The motto is from Atkinson's manuscript, made circa 1790. Together with the Martins, Joyces, Bodkins, St George and others, the Lynches formed the celebrated thirteen royal tribes of Galway. Numerous variations of the arms now exist. The Linch lines of Castle Cara in Mayo; of Clough Barrymore Castle, Galway; of Ballinafad, Galway; of Peterborough, of Lancaster, of Barna, of Lobarry and of Lovally all in Galway bore the crest with the tail of the lynx 'cowarded', i.e. down curved between the hind legs as though in fear. These lines bore the motto 'semper constans et fidelis'. (always or forever constant and faithful) the Clydagh and Duras lines charged a red mullet (star) in the chevron, and one on the shoulder of the lynx, and used the original motto: semper fidelis. All three lines bore the lynx with head in profile. The Lynch family of clogher house, in Mayo, bore the Lynx with head guardant, as did an English line, with the motto 'cor mundum crea in me deus'.

The Jacobite War in Ireland
On March 12, 1689, King James II, having fled his kingdom following the successful invasion of England by William of Orange, landed at Kinsale with the French ambassador, Count D'Avaux, Lord Melfort, James's Scottish secretary, two of the King's illegitimate sons, and 200 Irish and French officers, including Patrick Sarsfield. The faithful Earl of Tyrconnell, who had been mustering an Irish army, was made a duke. Wasting no time, James and the army marched to Derry, a pivotal town in James' plan of securing Ireland against William.
However, Derry did not surrender to the King's Irish army, nor did Enniskillen.There was constant bickering between the Irish and French, leading to serious problems with the morale of the army. After the disastrous rout of the Jacobite troops at The Battle of the Boyne, James left Ireland and returned to France, where he remained for the rest of the war. When William finally abandoned the first siege of Limerick in September 1690, it was not because he believed he had been beaten, but because the wider war on the Continent required his urgent presence. If William had not had this second war to occupy he and his army, there can be little doubt that the war in Ireland could have been concluded much more swiftly. The proof of this is shown by the way Marlborough, less than a month after William left Ireland, succeeded in capturing Cork and Kinsale.
The Williamite forces were in control of the north, east and south of the country by the beginning of 1691. St Ruth, the most competent and experienced military leader sent by Louis to aid the Irish, managed to put new life back into the Jacobites in the spring and early summer of 1691. But the loss of Athlone in July, followed by the crushing Jacobite defeat at Aughrim, which also saw the death of St Ruth and capture and death of many of the Irish gentry, saw the war enter its final act. Galway surrendered in less than a week. Captain Arthur French, of the Tyrone family, was Mayor of Galway at the time of Galway's surrender.
In addition, many members of the old Tribe families, as well as the native Irish gentry, fought for James, among them Sir Roger O'Shaughnessy and his son, Charles; Oliver Martyn of Tullira; Pierce Lynch of Rafiladown; Butler of Bunnahow and Butler of Ballygegan and Cregg; Sir Richard Blake of Ardfry, Speaker of the Supreme Council of the Confederate Catholics of Ireland; Darcy of Kiltulla; Francis Blake; various Lynches; various Kirwans, including John Kirwan, mayor in 1686; Dominick Browne, mayor in 1688; various O'Donnellans; Burkes; O'Briens of Clare; McDonnells, including Col Alexander McDonnell, mayor in 1690.