Difference between Queen Regnant and Porphyrogenitism

QUEEN REGNANT vs PORPHYROGENITISM: NOUN

A female monarch who reigns in her own right, in contrast to a queen consort, who is the wife of a reigning king.
A queen reigning in her own right.
A female sovereign ruler

The principle of succession in royal families, especially among the Eastern Roman emperors, by which a younger son, if born after the accession of his father to the throne, was preferred to an elder son who was not so born.
That principle of succession in royal families, especially in the families of the Byzantine emperors, in accordance with which a younger son, if born in the purple—that is, after the succession of his parents to the throne—was preferred to an older son who was not.

Regious, Kingling, Prince, Queen of england, Queenhood, Kingless, King, Grand duchess, Queen consort, Monarch, Female aristocrat, Queenlike, Queen dowager, Female monarch, Queen

Monarch, Interrex, Imperiality, Holy roman empire, Queen regnant, Aulic, Dapifer, Accessional, Royalize, Successionist, Regious, Interregent, Earl marshal, Royal, Succession

Unqueen, Regious, Kingling, Prince, Queen of england, Queenhood, Kingless, King, Grand duchess, Queen consort, Monarch, Female aristocrat, Queenlike, Queen dowager, Queen

Monarch, Interrex, Imperiality, Holy roman empire, Queen regnant, Aulic, Dapifer, Accessional, Royalize, Successionist, Regious, Interregent, Earl marshal, Royal, Succession

For example, Urraca, unlike any other woman discussed in this project, ruled as queen regnant, though her right to do so was frequently contested.
Queen Regnant automatically passes on her dynastic name to her son or daughter who succeeds her.
In most countries, Jeanne would automatically have become queen regnant on the death of her baby brother.