The Habsburg name was not continuously used by the family members, since they often emphasized their more prestigious princely titles. The dynasty was thus long known as the "House of Austria". Complementary, in some circumstances the family members were identified by their place of birth. Charles V was known in his youth after his birthplace as Charles of Ghent. When he became king of Spain he was known as Charles of Spain, and after he was elected emperor, as Charles V (in French, Charles Quint).
In Spain, the dynasty was known as the Casa de Austria, including illegitimate sons such as John of Austria and John Joseph of Austria. The arms displayed in their simplest form were those of Austria, which the Habsburgs had made their own, at times impaled with the arms of the Duchy of Burgundy (ancient).
After Maria Theresa married Duke Francis Stephen of Lorraine, the idea of "Habsburg" as associated with ancestral Austrian rulership was used to show that the old dynasty continued as did all its inherited rights. Some younger sons who had no prospects of the throne were given the personal title of "count of Habsburg".
The surname of more recent members of the family such as Otto von Habsburg and Karl von Habsburgis taken to be "von Habsburg" or more completely "von Habsburg-Lothringen". Princes and members of the house use the tripartite arms adopted in the 18th century by Francis Stephen.
The name of the dynasty is sometimes spelled in English publications as Hapsburg.
The name of the dynasty is sometimes spelled in English publications as Hapsburg