they were built to ward off the evil people of the dead
Easter Island is a natural feature, and was not built by mankind. I suspect you mean the stone heads standing on the Island. In which case, apparently, on one really knows for certain why they were erected.
There are around 900 Moai (stone heads) on Easter Island.
the coasts of Easter island
No. There is no a name for the heads of the East Island.
easter island heads
The heads
There are 887 giant stone statues on Easter Island called moai, and most of them have heads.
The average height of the Easter Island heads is around 13 feet, with some reaching up to 33 feet tall. The width of the heads ranges from about 6 to 13 feet.
887 heads were made in 300 CE to 400 CE
Easter Island is home to around 900 monumental statues, known as Moai, with many of them featuring heads. It is estimated that there are approximately 887 statues on the island, with most of them having heads.
They are called Paro's.