Complex sentence: Nicassio has speculated that one of the influences on Sardou's choice of name was the extremely similar name Caravadossi, a noble Italian family from Nice, the birthplace of Garibaldi, and at several points in its history under Italian control.
Split into simpler sentences: Nicassio has speculated that one of the influences on Sardou's choice for his name was the extremely similar name Caravadossi, a noble Italian family from Nice. Nice was an Italian-speaking province, the birthplace of Garibaldi, and at several points in its history under Italian control.