Philippa de Poitiers, princesse d'Antioche

-https://en.wikipedia.org/wiki/Philippa_of_Antioch
Philippa of Antioch (1148–1178) was the younger daughter of Constance, Princess of Antioch and her first husband Raymond of Poitiers. She was Lady of Toron by her marriage to Humphrey II of Toron and she was a mistress of Andronikos I Komnenos, who had seduced her while he was a guest at her stepfather's court. She had no children.

-http://fmg.ac/Projects/MedLands/ANTIOCH.htm#PhilippaMHonfroyIIToron

3. PHILIPPA of Antioch ([1148]-1178, bur St Mary, Josaphat). One manuscript of the Lignages d'Outremer records that "la princesse Constance" had two (unnamed) sons and two (unnamed) daughters by her first husband[174]. Niketas Choniates records that Philippa, sister of Empress Maria, was mistress of Andronikos Komnenos[175]. She met, and became the mistress of, Andronikos Komnenos while he was visiting Antioch in his capacity of Governor of Cilicia. The primary source which confirms her marriage has not yet been identified. Bohémond III Prince of Antioch confirmed donations to the church of St Mary, Josaphat, confirming that "mater sua Constantia, frater Raynaldus et soror Philippa" were buried there, by charter dated Sep 1181[176].

Mistress: (1166/67) of ANDRONIKOS Komnenos, son of ISAAKIOS Komnenos, sébastokrator & his wife Eirene --- ([1123/24][177]-murdered Constantinople 12 Sep 1185). He succeeded in 1183 as Emperor ANDRONIKOS I.

m (after 1166) as his second wife, HONFROY [II] Lord of Toron Constable of Jerusalem, son of HONFROY [I] Lord of Toron & his wife --- (-castle of Hunin 22 Apr 1179).