The term is used in areas of Dutch influence in New York, New Jersey and other areas of the former New Netherland colony of Dutch America to describe a strait, river, or arm of the sea. Examples are Kill Van Kull and Arthur Kill, both separating Staten Island, New York from New Jersey, and used as a composite name, Wallkill River in Orange County, New York and the Schuylkill River in Pennsylvania. Humorously, in Delaware, there exists a Murderkill River. "Kill" also shows up in location names as in the Catskill Mountains or the town of Fishkill, New York, which was the subject of a campaign by animal rights group, PETA, which wanted a more animal friendly name.
A reference to 'kil' can be found in Dutch geographical names, e.g. Dordtsche Kil and Sluiskil (in the Terneuzen municipality).