Eschivat IV de Chabanais
Eschivat IV of Chabanais (died 1283), son of Alix de Montfort, countess of Bigorre, inherited Bigorre from his mother in 1255. A quarrel with his aunt Martha, wife of Gaston VII of Béarn, brought Gaston's invasion; in 1256 Eschivat married Inès, daughter of Roger IV of Foix.
In 1258 he entrusted Bigorre to Simon de Montfort, who kept it and soon rebelled, after which Eschivat and Gaston reconquered the county. After his death, his aunt and his sister Laura disputed Bigorre.