Kings (Brooklyn) County, New York Genealogy
1664 Yorkshire became the first large government unit (not actually a county) organized by New York after the English took control from the Netherlands. It was divided into three ridings including West Riding (now Richmond, Kings, and most of Queens). 
1683 November 1 The Province of New York extinguished Yorkshire, creating Kings County from part of it. 
1874 The West Bronx was annexed to New York City (that is, New York County). 
1895 Areas east of the Bronx River were annexed to New York City (that is, New York County). 
1898 January 21 The five boroughs were consolidated into New York City and her county governments were dissolved. The Borough of Bronx became a borough of Greater New York City.
1912 April 19 (effective 1914 January 1) Bronx County, with the same boundaries as the borough, was separated from New York County. 
- Wikipedia contributors, "York Shire (Province of New York)" in Wikipedia: the Free Encyclopedia at http://en.wikipedia.org/wiki/York_Shire_(Province_of_New_York) (accessed 16 December 2011).
- Kathryn Ford Thorne, New York Atlas of Historical County Boundaries (New York: Simon and Schuster, 1993), 99. At various libraries (WorldCat); FHL Book 974.7 E7t.
- Wikipedia contributors , "The Bronx" in Wikipedia: the Free Encyclopedia at http://en.wikipedia.org/wiki/The_Bronx (accessed 4 January 2012).