The van Uden family originally lived in the Quinta do Carmo, in Almada

Almada

Almada is a municipality in Portugal, covering an area of 70.2 km² located on the southern margin of the Tagus River. Its municipal population in 2008 was 164,844 inhabitants; the urbanized center had a population of 102,357.The seat is the city of Almada....

. Infanta Maria Adelaide began working as a social assistant in some initiatives, because that area of Trafaria

Trafaria

Trafaria is a Portuguese town and a parish, located in the municipality of Almada. It has a population of 5,946 inhabitants and a total area of 5.83 km²....

 in Monte da Caparica, was very poor. She developed an intensive career, especially in the area whereby newborn poor or orphaned children were collected and then taken to the D. Nunes Alvares Pereira Foundation, of which she was President.

Her nephew D. Duarte Pio

Duarte Pio, Duke of Braganza

Dom Duarte Pio, Duke of Braganza , is the 24th Duke of Braganza and a pretender to the throne of Portugal.-Birth and education:...

, Duke of Braganza

Duke of Braganza

The title Duke of Braganza in the House of Braganza is one of the most important titles in the peerage of Portugal. Since the House of Braganza acceded to the throne of Portugal in 1640, the male heir of the Portuguese Crown was known as the Duke of Braganza and Prince of Brazil until 1822, or...

, is the present head of the House of Braganza

House of Braganza

The Most Serene House of Braganza , an important Portuguese noble family, ruled the Kingdom of Portugal and its colonial Empire, from 1640 to 1910...

 and, therefore, the first in the line of succession to the former Portuguese throne.
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Titles:

HH Princess Maria Adelaide of Braganza

HRH Infanta Maria Adelaide of Portugal

HH Princess Maria Adelaide of Braganza, Mrs. Nicolaas van Uden