Research Notes:

William of Tyre names him as brother of Louis VII King of France, when recording his arrival in Palestine in 1179. The Continuator of Aimon of Fleury names “Petrus” as sixth son of “rex Ludovicus” and his wife “Adalaidem filiam Humberti comitis de Mauriana”, adding that he married “filiam Rainaldi de Corteniaco” and had his land as there was no other surviving heir (“et terram ipsius habuit cum ea, quia non erat alius hæres superstes”).

He succeeded as Seigneur de Courtenay, de Montargis, de Châteaurenard, de Champignelles, de Tanlay, de Charny et de Charenton, by right of his wife. “Petrus dominus Curtiniaci et uxor mea Elisabeth” confirmed donations made by “antecessorum nostrorum...dominus Milo et filii eius” to Fontaine-Jean abbey by charter dated 24 Nov 1160, witnessed by “Willelmus de Cortiniaco...”. “Petrus...Ludovici Francorum regis frater” granted privileges to Montargis, with the consent of “uxoris suæ Helisabeth et Petri filii sui”, by charter dated 1170. “Petrus regis frater et Curtiniacensis dominus” confirmed donations to Fontaine-Jean abbey, with the consent of “uxor mea Ysabel et primogenitus meus Petrus”, by charter dated 1170, witnessed by “Ex parte domini et pueri...”. “Petrus de Curtiniaco frater regis” confirmed donations made to Fontaine-Jean abbey by “Guillelmus de Curtiniaco” on leaving for Jerusalem, with the consent of “uxoris mei Elisabeth”, by undated charter. “Petrus frater regis dominus de Monteargi et de Curtiniaco” donated property to Fontaine-Jean abbey on leaving for Jerusalem, with the consent of “uxor mea Ysabel et filius meus Petrus”, by charter dated 1179.

The necrology of La Cour-Dieu records the death “VI Id Mar” of “Petrus de Curtiniaco”. A charter dated “die festivo de Ramis palmarum” [=10 Apr] 1183 records that “Petrus de Curtiniaco regis Galliæ Philippi patruus” when he was alive donated “villam...Heruauuilla” to Notre-Dame la Royalle de Rosoy, with the consent of “Elisabeth uxor eius et Petrus eorundem maior filius et alii...Robertus, Philippus, Willelmus”. ¹