The Sui Iuris in Roman Law
It can be understood by sui iuris, any person whose rights and their exercise depend on their own legal status. That is, the rights he claims belong to him.
Thus, the sui iuris were all those who could possess rights by themselves, being fully free to dispose of them, contract new ones, or bind themselves; unlike the alieni iuris, whose rights were the fruit of their relationship with some sui iuris.
Hence, the sui iuris were legally independent, this means that only their own circumstances determined their rights. If his father or mother died, his rights were not altered─as with the alieni iuris─if another patrician died his rights were not altered─as in the patronage.
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