Born in Jerez de la Frontera, Province of Cádiz in Andalusia in 1845, he was the illegitimate son of Isabel Aladro Pérez and nobleman Juan Pedro Domecq Lembeye.

[4] During his diplomatic tours, he grew interested in the Albanian cause, and started publishing brochures all around Europe and the Mediterranean, including Brussels, Alexandria, Athens, Napoli, Venice, Bucharest, etc.

[5] Don Aladro kept contact with the Albanian Rilindas and was idealized by some of them as a rightful heir for a future throne of independent Albania.

[6] Aladro assisted financially the La Nazione Albanese newspaper of the Arbereshe publicist Anselmo Lorecchio, who from his side promoted him back.

The official Albanian version stands that Marigo Posio (a native of Korçë residing in Vlorë) embroidered it during the night.

[9] But the Great Powers did not like a Catholic candidate for the throne due to Albanian mixed religious nature and to possible opponent from non-Catholic communities (see:Religion in Albania) as well as considered Aladro "a starter" in that direction.

Aladro spoke correctly French, Italian, English, German, Spanish, Russian, Albanian, and Euskera (Basque).

[2][10] Back home, Aladro was considered a "perfect cavalier, a devoted Christian, an excellent son, and a lover of art".

[10] A document from the Ottoman archives of 1902, contains a photograph of Juan Pedro Aladro Kastriota next to a variant illustration of the Albanian flag.

The postcards were found alongside a calendar printed in Albanian and were in the possession of two individuals, Nuri Frashëri and Basco Barbatassi, who attempted to distribute them throughout the Ottoman Empire.