Brookline/brklan/ is a town in Norfolk County, Massachusetts, in the United States, and is a part of Greater Boston. Brookline borders six of Boston's neighborhoods: Brighton, Allston, FenwayKenmore, Mission Hill, Jamaica Plain, and West Roxbury. The city of Newton lies to the west of Brookline. At the 2010 census, the population of the town was 58,732. Brookline was first settled in 1638 as a hamlet in Boston, but was incorporated as a separate town in 1705. Brookline was known as the hamlet of Muddy River and was considered a part of Boston until the Town of Brookline was independently incorporated in 1705. (The Muddy River was used as the Brookline-Boston border at incorporation.) It is said that the name derives from a farm therein once owned by Judge Samuel Sewall.