| Guy | |
| Succession: | constable of Cyprus |
| Spouse: | Phillipa, daughter of Aimery Berlais |
| Issue: | Baldwin, constable of Cyprus Jean Aimery Balian, seneschal of Cyprus Philippe Isabelle Alice Eschive Mélisende Marie |
| Noble Family: | House of Ibelin |
| Father: | John of Ibelin, the Old Lord of Beirut |
| Mother: | Melisende of Arsuf |
| Birth Date: | 1215/1218 |
| Death Date: | after May 1255 |
Guy of Ibelin (French: Guy d'Ibelin) (1215/1218 – after May 1255) was marshal and constable of the kingdom of Cyprus. He was the fifth son of John of Ibelin, the Old Lord of Beirut, and of Melisende of Arsuf. He had close relations with the king of Cyprus, Henry I, acting as witness for two royal decrees; he was probably one of the king's executors named in a papal bull of Pope Alexander IV. With his brother Baldwin of Ibelin, he led the Cypriot crusaders in the siege of Damietta in 1248. According to the medieval chronicler Jean de Joinville, he was one of the most accomplished knights of his generation and a benevolent ruler on Cyprus. Joinville recounts an episode when he, Guy and Baldwin had been taken prisoner by Saracen rebels:
Guy married Phillipa Berlais, daughter of Aimery Berlais.[1] [2] Their children were: