Cauchy had two brothers: Alexandre Laurent Cauchy (1792–1857), who became a president of a division of the court of appeal in 1847 and a judge of the court of cassation in 1849, and Eugene François Cauchy (1802–1877), a publicist who also wrote several mathematical works.
Cauchy kishte dy vëllezër: Alexandre Laurent Cauchy (1792–1857), i cili ishte kryetar i gjykatës së apelit më 1847, dhe i gjykatës së kasacionit më 1849; dhe Eugène François Cauchy (1802–1877), një publicist i cili shkroi edhe disa punime matematikore.