Mark D. Ein is an American venture capitalist, sports team owner, and former doubles tennis player. He was born in Chevy Chase, Maryland, and earned a degree in economics from the Wharton School and a MBA from Harvard Business School. Ein worked for The Carlyle Group, Brentwood Associates, and Goldman Sachs before founding Venturehouse Group in 1999. He is a lifelong enthusiast of tennis who played in a few ATP tournaments. He is also chairman of the DC Open tennis tournament and the founder of the Washington Kastles of World TeamTennis (WTT).

Chevy Chase is the colloquial name of an area that includes a town, several incorporated villages, and an unincorporated census-designated place in southern Montgomery County, Maryland; and one adjoining neighborhood in northwest Washington, D.C. Most of these derive from a late-19th-century effort to create a new suburb that its developer dubbed Chevy Chase after a colonial land patent.