It's Wampanoag and doesn't refer to 'watering holes' at all but land formation - it means 'land below the hill', the traditional designation of the western part of Martha's Vineyard (or Noepe to the Natives) by the Wampanoag Nation. The 'hill' refers to Mashaianauke or Boyer's Hill, where the Nation's Tribal Facility is sited today. The nearby 'watering holes' are the Menemsha and Squibnocket ponds, divided by land called Nashaquitsa which means 'at the little divided island'.
Wampanoag is an Algonquin language of the N-dialect so the Massachuset, Nauset and Narragansett would speak similar tongues.
Devon