Complex sentence: He was born in Palermo (then the capital of The Kingdom of the Two Sicilies) into an aristocratic Sicilian family, however, his family were educated and of a more liberal disposition than many of their contemporaries.
Split into simpler sentences: He was born in Palermo (then the capital of The Kingdom of the Two Sicilies) into an aristocratic Sicilian family. However, his family was of a more cultured, liberal disposition than many of their contemporaries.