Jean Charles Lamoral of Ligne-La Trémoïlle

Although a junior member of the House of Ligne, he founded a distinct cadet branch of that princely family: at the death of his childless maternal uncle, Louis Jean Marie de La Trémoille, prince étranger, Prince Jean Charles legally appended his maternal surname, "de La Trémoïlle", to his own in Belgium.[2][3]

On 11 March 1942, he married in Paris, France Maria del Rosario de Lambertye-Gerbeviller, daughter of Charles Edmond de Lambertye, Marquis de Gerbeviller. They had three children, all of whom married into princely families:[2]

• Hedwige Marie (b. 1943); who married at Antoing, Belgium in 1966 to Charles de Mérode (b. 1940).
  • Emmanuel de Merode
• Charles-Antoine Lamoral (b. 1946), who married firstly in 1971 Lady Moira Forbes, daughter of the 9th Earl of Granard and his wife, Marie-Madeleine de Faucigny-Lucinge;[4] after their divorce in 1975, he wed secondly at Neuilly-sur-Seine, France on 23 January 1976 Alyette de Croÿ (b. 1951), from whom he was divorced in 2002. He has issue by the second marriage:

• Edouard Lamoral Rodolphe, born in Paris in 1976, and wed at Antoing Castle 29 June 2009 to film actress (and god-daughter of Silvio Berlusconi) Isabella Orsini (born at Perugia 2 December 1974).[5]

• Althea Isabelle Sophie
• Athénaïs Allegra Isabella
• Antoine Tau Édouard Adrien

• Charles Lamoral Joseph Malcolm, born in Paris in 1980, and wed at Antoing Castle 20 November 2010 to Ran Li (born in Guangdong, China).[6]

• Amadeo Joseph Gabriel

• Nathalie Marie (1948–1992); who married at Saint-Georges-sur-Loire, France in 1973 to Alain de Polignac (b. 1940).

His legal title and style in Belgium was: "His Highness Jean Charles de Ligne de La Trémoïlle, Prince de Ligne."