How and why did new netherland become New York and New Jersey?

England took New Netherlands and the king renamed it in honor of the Duke of York.

No because New York used to be called New Netherlands in 1664 before the English renamed it New York in honor o the Duke of York which is a city in England.

It became new york cause when Charles II gave duke of york the colony he named it after him . Which is ....York ..

They are separate states, so no, New Jersey is NOT in New York. No. It is a separate state and located adjacent to New York.The Hudson River separates New York and New Jersey.