The origin of Balian is not known. According to the Lignages d'Outremer, "Balian le Fransois fu frere au comte Guillaumin de Chartres" but this seems unlikely, the same source conflating Balian [I] with Balian [II]. Baudouin I King of Jerusalem confirmed donations to the church of St Marie, Josaphat by charter dated to [1115], including a donation by "…Barianus constabularius Joppæ…". William of Tyre records "Barisanus Joppe constabularius" among those present at the Council of Nablus in 1120 at which Gormundus Patriarch of Jerusalem delivered a sermon. "Balyanus Joppensis constabularius" donated property to the church of St Jean, Nablus, for the salvation of "uxoris Heluissæ", by charter dated May 1122, confirmed by "Hugone Rametensi, Balduino fratre eius domino Mirabelli, necnon Baliano". "Barisanus constabularius Joppensis" donated "casale Algie in territorio Ascalonis" to the Hospitallers, with the consent of "Hugonis domini Joppensis, et Emmæ uxoris", by charter dated 17 Jan 1126. William of Tyre records him as "Balianus senior" in 1132, suggesting that he was the father of another Balian. Balian was mentioned as a deceased benefactor, along with Guillaume of Bures (who was alive in Feb 1141), in the document confirming the constitution of the hospital of Notre Dame de Josephat, which was sealed by Guillaume Patriarch of Jerusalem, who died 27 Sep 1145, and so although undated must have been issued before that date.
http://fmg.ac/Projects/MedLands/JERUSALEM%20NOBILITY.htm#_Toc359684829
