Since the turn of this century families named Hirst, Lynch and Webb have been involved, successively, in farming, land ownership and real estate development in Northern.

This week Edwin W. Lynch Jr. joined Mason Hirst, Inc., Annandale realtors, where he will be working closely with Thomson M. Hirst, president of the firm.

Hirst said: "Bill's grandparents on both sides - the Lynches and the Webbs - settled in Fairfax County at the turn of the century and they became best friends with my grandparents, the Mason Hirsts. When my granddad started our realty firm in 1921, the Lynches and Webbs were among his best clients."

Hirst added that each family has sent a representative to the Virginia General Assembly.

Among the real estate developments in which members of the Hirst, Lynch and Webb families have been a part are, according to Hirst, Burke Center, Landmark Shopping Center, the Pinecrest golf courses, Langley Oaks and Signal Hill housing subdivisions, the Heritage office building, Little River Center, Springfield Holiday Inn, a Springfield office tower, Springfield Mall, and varied subdivisions in the Springfield, Va., area. Tha proposed Taubman shopping center at Routes 50 and 1-66 also involves land owned by the family triumverate.

A graduate of Occidental College, Edward W. Lynch Jr. plans to specialize in the brokerage of undeveloped land and income-producing properties for the Hirst firm.