Robert IV Bertran



I have reached a dilemma for Robert IV Bertan. Majority of the sources
online are in French which I do not comprehend. Thus I need
clarification.

What I have found:

Foundation for Medieval Genalogy (http://fmg.ac/Projects/MedLands/
NORMAN%20NOBILITY.htm#RobertIIIBertranA) reports:

Robert IV Bertran, m. Jeanne de la Roche-Tesson

and,

fmg (http://fmg.ac/Projects/MedLands/PARIS%20REGION
%20NOBILITY.htm#JeanITriediedbefore1237B) reports:

Robert IV Bertran, m. Jeanne de Trie (daughter of Jean de Trie)

Leo reports (http://www.genealogics.org/getperson.php?
personID=I00322528&tree=LEO)

1.Robert IV Bertran, m. Jeanne de Tire

Did Robert marry both? What is there connection?
.