Vlaie, Vly or Fly is the Dutch vlaie, meaning a swamp

Swamp

A swamp is a wetland with some flooding of large areas of land by shallow bodies of water. A swamp generally has a large number of hammocks, or dry-land protrusions, covered by aquatic vegetation, or vegetation that tolerates periodical inundation. The two main types of swamp are "true" or swamp...

. It also applies to creeks and mountains in the vicinities. The term appears in place names in areas of Dutch influence in North America, such as the Hudson Valley

Hudson Valley

The Hudson Valley comprises the valley of the Hudson River and its adjacent communities in New York State, United States, from northern Westchester County northward to the cities of Albany and Troy.-History:...

. The modern Dutch term is vlie.

Place names

Examples of names of swamps, streams, lakes, and mountains which contain "vlaie", or "vly":

New York

• Franklinton Vlaie
  Franklinton Vlaie
  Franklinton Vlaie or "The Vlaie" is a tributary of the Catskill Creek located in Broome in New York. Vlaie or Vly is a word for swamp which comes from the Dutch settlers of the area.-References:...
  
   - a swamp in Schoharie County which feeds the Catskill Creek
  Catskill Creek
  Catskill Creek is a tributary of the Hudson River that drains the east northern Catskill Mountains of the U.S. state of New York. From its source at Franklinton Vlaie in Schoharie County it flows southeast through parts of Albany County and Greene County to its mouth at the village of Catskill on...
  
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• The Vlaie
  Broome, New York
  ----Broome is a town in Schoharie County, New York, United States. The population was 947 at the 2000 census. The town is named after John Broome.The Town of Broome is on the eastern border of the county, southwest of Albany.- History :...
  
   - the area surrounding the Franklington Vlaie.
• Consalus Vly - a swamp in Saratoga County.
• Gayhead Vly - a swamp in Greene County near Leeds.
• Vly Creek - a stream in Delaware County.
• Vly Creek - a stream in Albany County.
• Great Vly - a swamp in Greene County which feeds the Sawyer Kill
  Sawyer Kill
  The Sawyer Kill or Sawyer's Kill is a tributary stream of the Hudson River in New York state. The source is at the Great Vlaie on the border of Ulster and Greene counties. The stream enters the Hudson River at Seamon Park in Malden, New York, just north of the village of Saugerties.Saugerties...
  
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• Vly Swamp - a swamp in Ulster County.
• Miner Mill Vly - A Beaver Flow in Saratoga County
• Fifteen typonyms for swamps in Hamilton County.

Other place names in New York using the toponym

Toponymy

Toponymy is the scientific study of place names , their origins, meanings, use and typology. The word "toponymy" is derived from the Greek words tópos and ónoma . Toponymy is itself a branch of onomastics, the study of names of all kinds...

 Fly

• Fly Creek, Fly Summit, and Fly Swamp - also known as Vly Creek, Vly Summit, and Vly Swamp, in Washington County.
• Fly Market in New York City - which may give the original meaning to "flea market".
• Fly Creek, Fly Pond, and Fly Brook in Broome County.
• Fly Swamp, or Vly Swamp, or "The Vly" - a swamp in Washington County.
• The Fly - a swamp in Otsego County.
• Rossman Fly - another name for Rossman Pond.
• The Old Fly - a swamp in Washington County.
• Shaw Fly - a swamp in Washington County.

New Jersey

• Bog and Vly Meadows - a swamp near Pompton Plains in Pequannock Township
  Pequannock Township, New Jersey
  Pequannock Township is a Township in Morris County, New Jersey, United States. As of the United States 2000 Census, the township population was 13,888....
  
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• The town of Tenafly
  Tenafly, New Jersey
  Tenafly is a borough in Bergen County, New Jersey, United States. As of the 2010 census, the borough population was 14,488. Tenafly is an affluent suburb of New York City....
  
   - a town in northern New Jersey meaning "Ten Swamps".
• Burnt Fly Bog - a swamp on the border of Middlesex and Monmouth Counties, New Jersey.

Out of use

• Sacandaga Vlaie - marshland now flooded by the Great Sacandaga Lake
  Great Sacandaga Lake
  The Great Sacandaga Lake is a large lake situated in the Adirondack Park in northern New York in the United States. The word Sacandaga means "Land of the Waving Grass" in the local native language. The lake is located in the northern parts of Fulton County and Saratoga County near the south...
  
   by the building of the Conklingville Dam
  Conklingville Dam
  The Conklingville Dam, in Hadley, New York, holds back the Great Sacandaga Lake which has a 129 mile perimeter. Boating, fishing, swimming and water sports are favorite summer fun activities. Many summer rentals of homes and boats are available....
  
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• The Vlaie or "Great Marsh" south of Oneida Lake in Madison County, New York
  Madison County, New York
  Madison County is a county located in the U.S. state of New York. As of the 2010 census, the population was 73,442. It is named after James Madison, fourth President of the United States of America...
  
  . Also known as Canaseraga Lake and was more than fifteen thousand acres before it was drained by pioneers in the 1800s by the digging of the Douglass Ditch to Lake Oneida.