Achter Kol (or Achter Col) was the name given to the region around the Newark Bay

Newark Bay

Newark Bay is a tidal bay at the confluence of the Passaic and Hackensack Rivers in northeastern New Jersey. It is home to the Port Newark-Elizabeth Marine Terminal, the largest container shipping facility in Port of New York and New Jersey, 3rd largest and one of busiest in the United States...

 and Hackensack River

Hackensack River

The Hackensack River is a river, approximately 45 miles long, in the U.S. states of New York and New Jersey, emptying into Newark Bay, a back chamber of New York Harbor. The watershed of the river includes part of the suburban area outside New York City just west of the lower Hudson River,...

 in northeastern New Jersey

Gateway Region

The Gateway Region is located in the northeastern part of State of New Jersey in the United States of America. The area encompasses Bergen, Essex, Hudson, Passaic, Union and Middlesex counties...

 by the first European settlers to it and was part of the seventeenth century province of New Netherland

New Netherland

New Netherland, or Nieuw-Nederland in Dutch, was the 17th-century colonial province of the Republic of the Seven United Netherlands on the East Coast of North America. The claimed territories were the lands from the Delmarva Peninsula to extreme southwestern Cape Cod...

, originally administered by the Dutch West India Company

Dutch West India Company

Dutch West India Company was a chartered company of Dutch merchants. Among its founding fathers was Willem Usselincx...

. At the time of their arrival, the area was inhabited by the Hackensack

Hackensack (Native Americans)

Hackensack was the exonym given to a band of Lenape, a Native American people is a European derivation of the Lenape word for what is now the region of northeastern New Jersey along the Hudson and Hackensack Rivers.-Territory and Society:...

  and Raritan groups of Lenape.
Placenaming by Dutch explorers and settlers during the era often referred to a location in reference to other places, its shape, its topography, and other geographic qualities.