In 1272, Robert married
Beatrice of Burgundy, heiress of Bourbon and had the following issue: •
Louis I, le Boiteux (1279–1341), first
Duke of Bourbon. • Blanche of Clermont (1281–1304); married in 1303 in
Paris Robert VII, Count of Auvergne and
Boulogne, grandmother of
Joan I, Countess of Auvergne. •
John of Clermont (1283–1316), Baron of Charolais; married c. 1309 Jeanne d'Argues, widow of
Hugh, Count of Soissons, and had issue. • Mary of Clermont (1285–1372, Paris), Prioress of • Peter of Clermont (1287 – aft. 1330), Archdeacon of Paris • Margaret of Clermont (1289–1309, Paris); married firstly, in 1305,
Raymond Berengar of Andria, and secondly, in 1308,
John I, Marquis of Namur. ==Health problems==