Question: Who is John Fitzgerald, 4Th Earl Of Desmond's uncle?

Knowledge 1: John FitzGerald, 4th Earl of Desmond
John FitzGerald, 4th Earl of Desmond (died 1399) was the son of Gerald FitzGerald, 3rd Earl of Desmond.He married and had one son, Thomas, who succeeded him as Earl of Desmond.According to Burke, John FitzGerald married Joan Roche, the daughter of Lord Fermoy.In March 1399 FitzGerald drowned at Ardfinnan on the River Suir, and was buried at Youghal.He was succeeded by his son Thomas FitzJohn FitzGerald, 5th Earl of Desmond. [SEP] Knowledge 2: Gerald FitzGerald, 3rd Earl of Desmond
Gerald FitzMaurice FitzGerald (1335–1398), also known by the Irish Gaelic "Gearóid Iarla" (Earl Gerald), was the 3rd Earl of Desmond, in southwestern Ireland, under the first creation of that title, and a member of the Hiberno-Norman dynasty of the FitzGerald, or Geraldines.He was the son of Maurice FitzGerald, 1st Earl of Desmond, by his third wife Aveline (Eleanor), daughter of Nicholas FitzMaurice, 3rd Lord of Kerry.He was half-brother to Maurice FitzGerald, 2nd Earl of Desmond.Maurice Fitzgerald, 2nd Earl of Desmond, would have been followed by Gerald's older brother, Nicholas, but Nicholas was described as "an idiot", and so was passed over for the earldom.Because of this, some older histories list Gerald as the 4th Earl.
Knowledge 1: John FitzGerald, 4th Earl of Desmond
John FitzGerald, 4th Earl of Desmond (died 1399) was the son of Gerald FitzGerald, 3rd Earl of Desmond.He married and had one son, Thomas, who succeeded him as Earl of Desmond.According to Burke, John FitzGerald married Joan Roche, the daughter of Lord Fermoy.In March 1399 FitzGerald drowned at Ardfinnan on the River Suir, and was buried at Youghal.He was succeeded by his son Thomas FitzJohn FitzGerald, 5th Earl of Desmond. [SEP] Knowledge 2: Gerald FitzGerald, 5th Earl of Kildare
Gerald FitzMaurice FitzGerald, 5th Earl of Kildare( d. before 24 June 1428) was an Irish peer.Gerald was the son of Maurice FitzGerald, 4th Earl of Kildare and Elizabeth Burghersh.
Knowledge 1: Gerald FitzGerald, 3rd Earl of Desmond
Gerald FitzMaurice FitzGerald (1335–1398), also known by the Irish Gaelic "Gearóid Iarla" (Earl Gerald), was the 3rd Earl of Desmond, in southwestern Ireland, under the first creation of that title, and a member of the Hiberno-Norman dynasty of the FitzGerald, or Geraldines.He was the son of Maurice FitzGerald, 1st Earl of Desmond, by his third wife Aveline (Eleanor), daughter of Nicholas FitzMaurice, 3rd Lord of Kerry.He was half-brother to Maurice FitzGerald, 2nd Earl of Desmond.Maurice Fitzgerald, 2nd Earl of Desmond, would have been followed by Gerald's older brother, Nicholas, but Nicholas was described as "an idiot", and so was passed over for the earldom.Because of this, some older histories list Gerald as the 4th Earl. [SEP] Knowledge 2: John FitzGerald, de facto 12th Earl of Desmond
John FitzGerald, de facto 12th Earl of Desmond( died December 1536) was the brother of Thomas FitzGerald, 11th Earl of Desmond.Upon his brother's death in 1534, John disputed the title to the earldom of his brother's grandson, James FitzGerald, de jure 12th Earl of Desmond.According to the" Annals of the Four Masters", John FitzThomas FitzGerald was believed to have instigated the murder of his older brother, James FitzGerald, 8th Earl of Desmond in 1487, and had been expelled by his brother Maurice FitzGerald, 9th Earl of Desmond.< ref>[ https://books.google.com/books?id=DdhC3eVIdHgC&pg=PA530&dq=James+FitzGerald,+8th+Earl+of+Desmond&hl=en&sa=X&ved=0ahUKEwjDkbTshJjZAhVPrVkKHVoGDLc4FBDoAQg_MAQ#v=onepage&q=James FitzGerald, 8th Earl of Desmond&f= false Connellan, Owen." The Annals of Ireland[ from A.D. 1171 to A.D. 1616", Dublin.Brian Geraghty, 1846, p. 309]

Answer: Maurice FitzGerald, 2nd Earl of Desmond