Other than Tanki, how many other known Amerindian settlements are on Aruba?

Context: Tanki is Papiamento for "pond", and Leendert is a common surname. An Amerindian village has been discovered near the town measuring 450 by 400 metres. It is one of the four known Amerindian settlements on Aruba. European pottery, pipes and bottles from the 18th century have also been discovered on the same site, suggesting a later resettlement.

Answer: Three (3). 4 - 1 = 3