It is believed that the Siwanoys, under the leadership of Wampage, led the massacre of the family of Anne Hutchinson. It has been written that Wampage himself was the murderer of Hutchinson, and that he adopted the name of Anhõõke (Anne Hoek) due to an Indian tradition of taking the name of a notable person personally killed. On June 27, 1654, 50,000 acres (200 km²) of land reaching from what is currently the Bronx, west along Long Island Sound, to the Hutchinson River, were granted to Thomas Pell under the Treaty Oak near Bartow Pell Mansion in Pelham, with Wampage signing. The other Siwanoys who signed the treaty were Shawanórõckquot, Poquõrúm, Wawhamkus and Mehúmõw. Cockho, Kamaque and Cockinsecawa were three additional Siwanoys who signed as "Indyan Witnesses" to the "Articles of Agreement" section of the Treaty.
Sources indicate that Wampage's daughter Ann (or Anna) married Thomas Pell II, who was the third lord of Pelham Manor.