 The first wave of Jewish immigrants in New York are of Sephardic origin, a scant 10,000 from the Netherlands, Italy, Spain and Portugal in the 17th and 18th centuries, but in the 19th century more newcomers were first German and finally in the early 20th century millions from Eastern Europe like Poland and Russia, both of Ashkenazi origin.In the late 20th century, a smaller wave of Russian Jews and Ukrainian Jews settled in the Brighton Beach section in Brooklyn, and New York has many Israeli-American residents.The intense development, urbanization and suburban sprawl of New York City makes it the most populated region in the U.S., an estimated 20 to 30 million in the eight-state Megalopolis stretching 500 miles from Boston to Washington, D.C., with New York City in the middle has 15 million residents in a 100-mile radius including Philadelphia (1.5 million in its city limits), northern New Jersey and Connecticut.