The Siwanoys under the leadership of Wampage massacred the family of Anne Hutchinson (1591–1643). It has been written that Wampage himself was the murderer of Hutchinson and that he adopted the name of Anhõõke (Anne Hoek) due to a Native American tradition of taking the name of a notable person personally killed. On June 27, 1654, 50,000 acres (200 km²) of land were granted to Thomas Pell, reaching from the Bronx west along Long Island Sound to the Hutchinson River. Wampage and other Siwanoys signed a treaty under the Treaty Oak near Bartow Pell Mansion in Pelham. The other Siwanoys who signed the treaty were Shawanórõckquot, Poquõrúm, Wawhamkus, and Mehúmõw. Cockho, Kamaque, and Cockinsecawa also 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.