Arrigo Castracani degli Antelminelli

Arrigo Castracani degli Antelminelli, called the Duchino (c. 1304–1357), was the eldest son and designated heir of the Lucchese condottiero Castruccio Castracani, the Ghibelline strongman who beat the Florentines at Altopascio in 1325 and was named duke of Lucca by Emperor Louis IV.

In 1325 Arrigo became Lucca's captain general and rector for life. Castruccio died of fever in 1328 while preparing to fight Florence again, and Louis IV then took Pisa and Lucca from his son. Arrigo repeatedly tried to recover his family's rule: in 1331 he briefly seized Lucca, only to be driven out by King John of Bohemia.

He later fought alongside Pisa but was again denied control of Lucca. Accused of conspiracy against Giovanni da Oleggio, he was executed at Bologna in 1357.