How was the culture of the indigenous people in Luzon?

Luzon Island, Philippines

A majority, over 80% of the people of Luzon would describe themselves as Roman Catholic. There are many other groups make up the rest. Protestant Christianity makes up part of the rest. Another group is Iglesia ni Christo, a Philippine-founded religion tied to Christianity historically. Another group is Islam, mostly consisting of people who have emigrated from Southern Philippines.

Of course, Luzon is one of the largest and most populous islands in the world. It is not surprising that nearly every religious group on earth has adherents on the Island of Luzon.