There is no strict formal or legal definition in Brazil as to who is or is not a member of the royal family, and different lists will include different people. However, those carrying the style HRM or His/Her Royal Majesty and HRH or His/Her Royal Highness, His/Her Highness, and Her Most Faithful Majesty are usually considered members. By this criterion, the royal family usually include the monarch, the monarch's consort, the widows of former monarchs and the queen mother, the children and male-line of the current and former monarchs, the children of the eldest son of the Crown Prince of Brazil, and wives or widows of children and male-line grandchildren of the monarch or previous monarchs.
A branch of the Portuguese Royal Family that broke bonds with Portugal in 1821, the members of the royal family belong, either by birth or marriage, to the House of Braganza mainly. Typically, members use the household name as a surname, or in the case of inter-dynastic birth, the name of the two houses to which they belong.
Differently from other royal families, the dynasty is not solely passed by male-line. The monarch inherit the household from his or her parent (or grandparent and so on) who was the reigning monarch previously, king or queen. For example, Queen Eliza Regina's children belonged all to the House of Braganza, even if her husband and consort, King Frederik, was from the Dutch House of Orange-Nassau and by the standards of other monarchies their children would be Orange-Nassau, not Braganzas, because he was a man.
In the Kingdom of the United Provinces of Brazil, differently from most of the European monarchies, distinguishing who is a member of the Royal Family is easy due to a conjunct of legal and formal definitions of who is or not a member.
The Royal Family is divided into Core Family, Outer Family and Extended Family.
The Core Family is always formed by:
- the Monarch;
- his or her Consort;
- the Monarch's children and grandchildren;
- the monarch's siblings and their children
- the Queen Mother.
Aside from the Monarch and the Consort, as well as the Queen Mother, and the heir-apparent, titled as Crown Prince/Princess of Brazil, the members of the Core Family are all titled Royal Princes/Princesses of Brazil.
The official styles to each are His/Her Royal Majesty (HRM) to the monarch and the consort; His/Her Royal Highness (HRH) to the Crown and Royal Princes and Princesses of Brazil; and Her Most Serene Majesty to the Queen Mother.
The Outer Family includes:
- the Monarch's uncles and aunts;
- his or her cousins and their spouses and children;
- the consorts of previous monarchs;
- the monarchs who have abdicated.
From those, the previous monarchs who have abdicated are titled as Prior Prince/Princess, the monarch's uncles and aunts and his or her cousins are titled as Royal Prince/Princess of Brazil if descendant from a previous monarch to the third generation, i.e., if they have a previous monarch as a parent or grandparent. The rest are titled simply as Prince/Princess of Brazil.
The official styles to each are, besides the Royal Princes and Princesses, His/Her Highness (HH) to the Princes and Princesses of Brazil. The Prior Princes/Princesses are styled His/Her Memorable Highness (HMH).
The Extended Family includes those who do not hold the title of Prince or Princess of Brazil, but Prince or Princess of their houses or do not hold a title anyway. They are the descendants of the current or previous monarchs' grandchildren.
In a simple way. The Royal Princes and Princesses of Brazil (HRH) are children and grandchildren of the current and previous monarchs. The Princes and Princesses of Brazil (HH) are the children of second generation Royal Princes or Princesess. The Princes and Princesses of the House are the first-born child of a Prince or Princess of Brazil.
The official styles to each are His/Her Highness (HH) to the Princes and Princesses of their respective Houses. The rest are called His High Lordship and High Ladyship.
Current members of the Brazilian Royal Family are:
(Bold: Royal-born; Normal: Married with a Royal; Italic: Royal-born or Noble-born married with a Royal).
- HRM Marco II, King of the United Provinces of Brazil
- HRM Alice, Queen of Brazil (King's consort)
- HRH Miguel Lorenzo, Crown Prince of Brazil (King's son)
- HRH Klaus, Royal Prince of Brazil (King's brother)
- HRH Carlos Eduardo, Royal Prince of Brazil (King's brother)
- HRH Anna, Royal Princess of Brazil (King's sister-in-law)
- HRH Heitor, Royal Prince of Brazil (King's brother)
- HRH Hinata, Royal Princess of Brazil; Imperial Princess of Japan (King's sister-in-law)
- HRH Takeo, Royal Prince of Brazil; Imperial Prince of Japan (King's nephew)
- HRH Elisa, Royal Princess of Brazil (King's sister)
- HRH Felipo, Royal Prince of Brazil (King's brother-in-law)
- HMSM Carlota, Queen Mother of Brazil (King's mother)
- HRH Mariana, Royal Princess of Brazil, Duchess of Niss (King's aunt)
- HRH Tobias, Royal Prince of Brazil, Duke of Niss
- HRH Amara, Royal Princess of Brazil, Countess of Alva (King's cousin)
- HRH Mauro, Royal Prince of Brazil, Count of Alva
- HH Lucas, Prince of Brazil (King's second cousin)
- HRH Lir, Royal Prince of Brazil (King's cousin)
- HRH José Carlos, Royal Prince of Brazil (King's uncle)
- HRH Ana Julia, Royal Princess of Brazil
- HRH Aquiles, Royal Prince of Brazil (King's cousin)
- HRH Eros, Royal Prince of Brazil (King's cousin)