Mariano Sozzini il giovane also Socini (1482–1556) was an Italian jurist after whom the cautela sociniana is named. He was descended from
Mariano Sozzini the elder (1397–1467) the first of the family of freethinkers.
Mariano the younger was born in
Siena. He married Agnese Petrucci and had seven sons including
Celso Sozzini,
Lelio Sozzini, and Alessandro Sozzini, who died young, but was father of
Fausto Sozzini, became the figurehead of the Unitarian "
Socinian" movement in Poland.