The four sisters of Empress Elisabeth of Austria, popularly known as Sissi:
Helene Caroline Therese, Hereditary Princess of Thurn and Taxis.
Maria Sophie of Bavaria, Queen of the Two Sicilies.
Mathilde Ludovika, Countess of Trani
Sophie Charlotte Augustine, Duchess of Alencon
Picture n- 1 and n-3 are the same person, Mathilde in Bavaria, countess of Trani.
This is Helene aka Nene, Princess of Thurn and Taxis