Kaspar Kornelius Mortaigne de Potelles (1609 – 10 July 1647 Sankt Goar) was a Flemish General-Lieutenant who fought during the course of the Thirty Years' and Hessian Wars.

Mortaigne became a squire of Prince Philipp, son of Maurice, Landgrave of Hesse-Kassel, while he was pursuing a military education in the Netherlands.

[1][2] Mortaigne became a leader of a large scale mutiny which paralyzed the Swedish army, demanding the immediate payment of their arrears.

Mortaigne was promoted into brigadier general and received land in Pomerania, while the rest of the army was paid the sum of 486,200 thalers settling the crown's debts.

On 10 July 1647, a cannonball crushed his left leg, gravely wounding him while he was besieging the Rheinfels Castle.