Philippe François de Ligne, (30 July 1625 - 17 December 1674), 7th Duke of Aarschot, 1st Duke of Arenberg, a Knight of the Order of the Golden Fleece, was the first son of the second marriage of Philippe Charles, Comte d'Arenberg and Isabelle Claire de Berlaymont.
On 14 July 1642 Philippe François married 15 year old Magdalena de Borja y Doria, daughter of Francisco Diego Pascual de Borja, 8th Duke of Gandia and Artemisia Maria Teresa de Doria-Carretto. In 1646, aged 21, Philipe was made a Knight of the Order of the Golden Fleece.
Their children:
1 François d'Arenberg (5 September 1643 - 10 September 1643).
2 Isabelle Claire Eugénie d'Arenberg (12 July 1644 - 5 October 1655).
When he died in December 1674, the title passed to his step-brother, Charles Eugene, 2nd Duke of Arenberg, (1633–1681), who was promoted to become a Knight of the Order of the Golden Fleece in 1678.