What is "manahoac"

The Manahoac, also recorded as Mahock, were a small group of Siouan-language American Indians in northern Virginia at the time of European contact. They numbered approximately 1,000 and lived primarily along the Rappahannock River west of modern Fredericksburg and the fall line, and east of the Blue Ridge Mountains. They united with the Monacan, the Occaneechi, the Saponi and the Tutelo. They disappeared from the historical record after 1728. According to William W. Tooker, the name Manahoac is Algonquian for "they are very merry", but anthropologist John R. Swanton considers this dubious.