Wedding
I found photos of the weddings of the various children of the Duchess of Parma Maria Antonia. They are rare photos that I struggled to find!
https://www.pinterest.fr/pin/184718022206435282/: Wedding of Prince Felix to the Grand Duchess of Luxembourg: in the front row, seated, we find the mothers of the spouses: the Grand Duchess Maria Anna and the Duchess Maria Antonia (sisters), the newlyweds and Princess Henriette-Anne of Bourbon-Parma, Felix's sister. Standing (from left), we find: Prince Gaetan of Bourbon-Parma, Prince François-Xavier of Bourbon-Parma, Princess Hilda of Luxembourg, Princess Isabelle-Marie of Bourbon-Parma, Princess Elisabeth of Luxembourg, Prince Renée of Bourbon-Parma, Princess Maria-Antonia of Bourbon-Parma, Princess Sophie of Luxembourg, Prince Louis of Bourbon-Parma and Prince Sixte of Bourbon-Parma
ETA:
https://www.pinterest.fr/pin/223843043964249345/ family reunion of the House of Bourbon-Parma in the year 1932. In the photo I do not know who the children are, but in the front row we can find (from left): Princess Isabelle-Marie of Bourbon-Parma, Princess Beatrix of Bourbon-Parma (the Countess Lucchesi-Palli), Prince Sixte of Bourbon-Parma, the Duchess Mother (Maria Antonia, née Infanta of Portugal), Princess Zita of Bourbon-Parma (the Empress of Austria), Princess Henriette-Anne of Bourbon-Parma and Prince Felix of Bourbon-Parma (the Prince consort of Luxembourg).
In the second row from left: Princess Margarete of Bourbon-Parma (née Princess of Thurn und Taxis; wife of Prince Gaetan of Bourbon-Parma), Princess Hedwige of Bourbon-Parma (née Princess de la Rochefoucauld; wife of Prince Sixte of Bourbon-Parma), three women whose identity I do not know, Princess Adelgundes of Bourbon-Parma the Dowager Countess of Bardi (née Infanta of Portugal; sister of the Duchess of Parma; wife of the late Prince Henry of Bourbon-Parma, Count of Bardi), Prince François-Xavier of Bourbon-Parma, Prince Renée of Bourbon-Parma, Prince Gaetan of Bourbon-Parma.
Third row, from left: Prince Robert Hugo of Bourbon-Parma (son of Elias I), Princess Marie-Françoise of Bourbon-Parma (daughter of Elias I), Princess Margaret of Bourbon-Parma (née Princess of Denmark; wife of Prince Renée of Bourbon-Parma), Grand Duchess Charlotte of Luxembourg, Princess of Bourbon-Parma (née Princess of Luxembourg; wife of Prince Felix of Bourbon-Parma, the Prince Consort of Luxembourg) and Princess Marie-Thérèse of Bourbon-Parma.
Fourth row, from left: two men and a woman whose identity I do not know and Princess Louise-Marie of Bourbon-Parma.
Even higher up we find three men (I think one is Duke Elias I of Parma and Piacenza, son of Princess Maria Pia of Naples and Sicily, first wife of Duke Robert I).