Complex sentence: The team is named after the Auca tribe, who are also called "Huaorani", because it originally belonged to Royal Dutch/Shell, which had been operating oil fields in the east of Ecuador where the Aucas live.
Split into simpler sentences: The team is named after the Auca tribe, who are also called "Huaorani". The club originally belonged to Royal Dutch Shell, which had been operating oil fields in the east of Ecuador where the Aucas live.