Louis De+ Brienne
Louis De+ was born about 1228.

 Agnes De+ Beaumont-au-Maine
Agnes De+ was born about 1235.

 Jean De Brienne-Beaumont
Jean De was born about 1255.

 Jeanne De+ Brienne-Beaumont
Jeanne De+ was born about 1264.  She died in 1323.

 Marie De Brienne-Beaumont
Marie De was born about 1265.  She died after 1339.

 Henry De+ Brienne-Beaumont
Henry De+ was born about 1275 in Buchan, Aberdeenshire, England.  He died on March 10th, 1339.