Talk:House of Poitiers-Valentinois
The counts of Valentinois always used the six bezants design from the very first known seal :
(from Roman, Joseph - Description des sceaux des familles seigneuriales de Dauphiné)
There are however a few variants : A couple of seals show ten bezants which could also be interpreted as a semis of bezants instead of six :
The lords of Saint-Vallier used either the same arms (probably brisure by tincture, we'll never know for sure) or a variant featuring a lion (gules ? not sure but it's painted somewhere, probably at the Loives House, I'll have to verify) in chief :
The lords of Chalançon used a bend as brisure (I'd say argent for the tincture but there's no way to be sure).
The proper name for the dynasty is House of Poitiers (from a castle near Grignan, Peytieu in fr., Pictavius in latin) : they were only called Valentinois or Poitiers-Valentinois by later historians to distinguish them from their famous homonyms but you can see from their seals that they consistently named themselves Poitiers.
They are counts of both Valentinois and Diois (at different dates) for which their predecessors are the respectively the Adhémar (their cousins, direct descendants of count Adhémar de Valence) and Aix-Artaud families (lords of Aix and Montauban, descendants of the former counts of Die).