Franquemont was born in Ludwigsburg, the son of an illegitimate union of Charles Eugene, Duke of Württemberg (1728–1793) and the dancer Regina Monti.

In 1787 he left school and became a 2nd Lieutenant in the Württemberg Cape Regiment, a unit recruited for foreign service and seconded to the Dutch East India Company.

He became a captain and rose through the ranks in rapid succession - in 1807 he was a colonel and led the 1st Battalion of the Kronprinz Regiment, in 1808 he was made major general.

In 1818, King William awarded him with the Grand Cross of the Order of the Crown.

In 1823 he ended his career as a minister and became commander of the 6th Infantry Regiment "Crown Prince".