Hugh IV of Cyprus
Hugh IV( 1293×96 – 10 October 1359) was King of Cyprus from 31 March 1324 to his abdication, on 24 November 1358 and, nominally, King of Jerusalem, as Hugh II, until his death.
The son of Guy, Constable of Cyprus( son of Hugh III of Cyprus), and Eschiva of Ibelin, Hugh succeeded his father as Constable of Cyprus in 1318, and later succeeded to the throne of Cyprus on the death of his uncle Henry II, since Henry II had no son.
He was a member of the House of Poitiers- Lusignan.
Enguerrand I, Count of Ponthieu
Enguerrand I was the son of Hugh I of Ponthieu and Gisela, daughter of Hugh Capet.
Henry of Antioch
Henry of Antioch (b. 1198–1217, d. 18/27 of June, 1276), alternately known as Henri de Poitiers or Henry of Poitiers, was the son of Bohemond IV of Antioch, Prince of Antioch and his first wife Plaisance Embriaco de Giblet.
In 1233 Henry married Isabella de Lusignan, the daughter of Hugh I of Cyprus and Alice of Champagne.
In 1263, she was appointed regent of Jerusalem and in turn appointed Henry bailli of the kingdom.
Henry and Isabella had two children:
His children both adopted their mother's surname of "de Lusignan", founding the Second House of Lusignan.
Henry drowned at sea of Tyre in June, 1276 while sailing to Tripoli in a German ship.
His body was recovered and, after the death of Hugh III, both were returned to Nicosia for burial.
Guy, Constable of Cyprus
Guy of Poitiers- Lusignan( 1275/80- 1303) was constable of Cyprus from 1298.
He was the youngest son of Hugh III of Cyprus( 1267- 1284) and Isabella of Ibelin.
He married Eschiva of Ibelin, Lady of Beirut.
Their children were:
James III of Cyprus
James III of Cyprus( or Jacques III de Lusignan)( 6 July 1473 – 26 August 1474) was the only child by the marriage of James II of Cyprus and Catherine Cornaro.
He died in mysterious circumstances as an infant, leaving his mother as the last Queen of Cyprus.
His death paved the way for Venice to gain control of Cyprus.
Isabella of Ibelin, Queen of Cyprus and Jerusalem
Isabella of Ibelin( 1241–1324), was Queen of Cyprus and Jerusalem by marriage to Hugh III of Cyprus.
She was the daughter of Guy d' Ibelin, marshal and constable of the Kingdom of Cyprus, and of Philippa Berlais.
She married Hugh III of Cyprus( 1235 – 1284), the King of Cyprus( reign 1267 – 1284).
Marie of Lusignan, Queen of Aragon
Marie of Lusignan (1273 – Tortosa, April 1319) was a daughter of Hugh III of Cyprus and his wife Isabella of Ibelin.
She was Queen of Aragon by her marriage and was a member of the House of Poitiers-Lusignan.
Catherine Cornaro
Catherine Cornaro( 25 November 1454 – 10 July 1510) was the last monarch of the Kingdom of Cyprus.
She was queen consort of Cyprus by marriage to James II of Cyprus, regent of Cyprus during the minority of her son James III of Cyprus in 1473 – 1474, and finally queen regnant of Cyprus.
She reigned from 26 August 1474 to 26 February 1489 and was declared a" Daughter of Saint Mark" in order that the Republic of Venice could claim control of Cyprus after the death of her husband, James II.
Hugh III of Cyprus
Hugh III of Cyprus (1235 – 24 March 1284), born Hugues de Poitiers, later Hugues de Lusignan
(he adopted his mother's surname "de Lusignan" in 1267), called the Great, was the King of Cyprus from 1267 and King of Jerusalem from 1268 (as Hugh I of Jerusalem).
He was the son of Henry of Antioch and Isabelle de Lusignan, the daughter of king Hugh I of Cyprus.
He was a grandson of Bohemund IV of Antioch and thus a descendant of Robert Guiscard.
From 1261 he served as Regent for Hugh II of Cyprus in Cyprus, as the "Haute Cour" of Cyprus considered him, as a male, a better regent than his mother Isabella.
She was, however, accepted as the Regent of Jerusalem in 1263.
She died in 1264, and Hugh became the acting regent of the Kingdom of Jerusalem as well as Cyprus.
The regency was contested by his first cousin, Hugh of Brienne, who was the son of Mary of Cyprus, the eldest daughter of Hugh I and hence the senior heir to Cyprus, and heir to Jerusalem after Hugh II.
However, the "Haute Cour of Jerusalem" declared Hugh of Antioch the next regent, as successor to Isabella in proximity of blood.
Hugh II died in 1267 without heirs.
As Hugh of Brienne did not advance his claim on the throne, Hugh of Antioch succeeded as uncontested King of Cyprus on 5 December and was crowned at Santa Sophia, in Nicosia, on 24 December.
He claimed the Kingdom of Jerusalem as well in 1267 or 1268 upon the execution of Conradin.
However, the throne of Jerusalem was also claimed by Mary of Antioch by proximity of blood to Conradin.
The "Haute Cour of Jerusalem" rejected her claim and Hugh was crowned King of Jerusalem at Tyre on 24 September 1269.
Hugh and his descendants, the Kings of Cyprus, assumed his mother's surname of Lusignan in 1267, having inherited Cyprus through that family, thus establishing the Second House of Lusignan.
Hugh disliked dealing with the various factions in the Kingdom of Jerusalem, and left for Cyprus in 1276 in disgust at their defiance of his authority.
The next year, his bailiff, Balian of Ibelin, Lord of Arsuf, was ejected by Roger of Sanseverino, the bailiff of Charles of Anjou, who had purchased the claim of Mary of Antioch.
The kingdom remained under Angevin control for the rest of Hugh's reign.
It is supposed that Thomas Aquinas' work "On Kingship" was written for Hugh III.
He was buried at Santa Sophia, in Nicosia.
Barral of Baux
Barral of Baux( died 1268) was Viscount of Marseilles and Lord of Baux.
He was the son of Hugh III of Baux, Viscount of Marseilles, and Barrale.

Question: Who is Hugh Iii Of Cyprus's paternal grandfather?