The Ortoiroid people were the second wave of human settlers of the Caribbean who began their migration into the Antilles around 2000 BC.[1][2] They were preceded by the Casimiroid peoples (~4190-2165 BC). They are believed to have originated in the Orinoco valley in South America, migrating to the Antilles from Trinidad and Tobago to Puerto Rico. The name "Ortoiroid" comes from Ortoire, a shell midden site in southeast Trinidad. They have also been called Banwaroid, after another archaeological site in Trinidad.[3][4]