Nissequague, now so written, the name of a hamlet in Smithtown, and of record as the name of a river and of a neck of land still so known, is of primary record _Nisinckqueg-hackey_ (Dutch notation), as the name of a place to which the Matinnecock clan removed after the war of 1643. (Col. Hist. N. Y., xiv, 60.) The English scribes wrote Nesequake (1650), Nesaquake (1665), Nessequack (1686), Wissiquack (1704), (Cal. N. Y. Land Papers), and other forms. The Indian deed of 1650 (Smithtown Records) recites the sale by "Nasseoonseke, sachem of Nesequake," of a tract "Beginning at a river called and commonly known by the name of Nesaquake River, and from that river eastward to a river called Memanusack." "Nesaquauke River" is the entry in patent to Richard Smith, 1665. The stream has its source in a number of springs in the southern part of Smithtown, the flow of which forms a considerable river. (Thompson.) The theory that "The tribe and river derived their name from Nesequake, an Indian sagamore, the father of Nassaconset" (Hist. Suf. Co.), is not well sustained. The suffix _-set,_ cannot be applied to an animate object; it is a locative meaning "Less than at." In addition to this objection, Nassaconset is otherwise written Nessaquauke-ecoompt-set, showing that the name belonged to a place that was "On the other side" of Nessaquauke. Neesaquauke stands for _Neese-saqû-auke,_ from _Nisse,_ "two," _Sauk,_ "Outlet," and _-auke,_ "Land" or place, and describes a place at "the second outlet," or as the text reads, "At a river called and commonly known by the name of Nesaquake River." The sagamore may have been given the name from the place, but the place could not have taken the name from the sagamore. The estuary, now known as Nissequage Harbor into which the stream flows, extends far inland and forms the west boundary of Nissequage Neck. Marsepinck, a stream so called in Queens County, from which extended to the land which was sold, in 1639, by "Mechowout, chief sachem of Marossepinck, Sint-Sink and dependencies," and also extended to an Indian clan known as Marsepings, is no doubt an orthography of _Massepe_ and _-ing,_ locative. It means "At, to or on the great river." _Mas_ is an abbreviation of _Massa, Missi,_ etc., "great," and _Sepe,_ means "river." It was probably used comparatively-the largest compared with some other stream. (See Massepe.) Unsheamuck, otherwise written Unthemamuk, given as the name of Fresh Pond, on the boundary line between Huntington and Smithtown, means "Eel-fishing place." (Tooker.) Suggamuck, the name of what is now known as Birch Creek, in Southampton, means "Bass fishing-place." (Tooker.) Rapahamuck, a neck or point of land so called, is from _Appé-amuck,_ "Trap fishing-place." (Tooker.) The name is assigned to the mouth of Birch Creek. (See Suggamuck.)