[1] His mother was the legitimatised daughter of Gian Battista Serra, 12th Prince of Gerace and Donna Maria Grazia Carafa d'Andria .

The couple have had two sons and one daughter:[10] Windisch-Graetz and his family reside in Italy when he is not abroad on a diplomatic appointment, maintaining a home in Rome and another in Sant'Angelo d'Alife.

[1] The business activities of Windisch-Graetz include the food production industry, notably biscuits and mozzarella cheese, and entrepreneurial finance.

[2] In the early 1990s, he was a major shareholder in the Banco di Napoli and a holding company, Sogesco, of which he owned 82%, was capitalised at 10 billion lire.

In March 2009, he was appointed Ambassador of the Sovereign Military Order of Malta to the Republic of Slovenia.