Complex sentence: In 1779, arrived to Louisiana other boat with 500 people from the Malaga (in Andalusia), who settled in New Iberia, where they married with Cajuns already living there.
Split into simpler sentences: In 1779, arrived to Louisiana other boat with 500 people from the Malaga (in Andalusia). These settlers settled in New Iberia, where they married with Cajuns already living there.