Bertrand de Blanchefort (or Blanquefort) was the sixth Grand Master of the Knights Templar, from 1156 until his death in 1169. He is known as a great reformer of the order.
” He wrote the ‘Retraits’, which specified the hierarchical usages and actions of the Master.
In other words, de Blanchefort differentiated the Templar ranks based on the status and mission of each dignitary and member. It also specified that the Master could no longer decide the collective future of the Order without the agreement of the General Chapter.” – http://www.templiers.org/bertrandblanchefort-eng.php
Ida de Blanquefort, the mother of Bertrand de Got , (Pope Clement V, † 1314)
Guy de Blanchefort (1446 – 1513) was the 42nd Grand Master of the Knights Hospitaller (later know as Sovereign Military Order of Malta) from 1512 to 1513.
Guy de Blanchefor’s uncle was Pierre d’Aubusson which was the 40th Grand Master of the Knights Hospitaller (later know as Sovereign Military Order of Malta) from 1476–1503.
More on this family can been found here http://de.wikipedia.org/wiki/Blanchefort