His descendant, another Sibaud, commanded some troops which aided Pope Calixtus II in his struggle with the Antipope Gregory VIII.

[1] A direct descendant, Ainard (died 1349), called Viscount of Clermont, was granted the dignity of captain-general and first baron of Dauphiné by his suzerain Humbert, dauphin of Viennois, in 1340; and in 1547 Clermont was made a county for Antoine (died 1578), who was governor of Dauphiné and the French king's lieutenant in Savoy.

This soldier served his country during a long period, fighting in Bohemia and Alsace, and then distinguishing himself greatly at the battles of Fontenoy and Lawfeldt.

[1] In 1909, Peter Kropotkin tells the story of one military commander, Clermont-Tonnerre, who in 1788 promulgated the edict which dissolved the parlement of the people of Grenoble during the French Revolution.

The tocsin was rung, and the alarm spreading quickly to the neighboring villages, the peasants hastened in crowds the town.