Edgar Legum, former president of The Legum Distributing Co., a large wholesale appliance distributor, has been named president of George's Radio & T.V. He will be responsible for the overall operation of the 12 Washington-based George's stores and the five Baltimore area Bernie & Harry's stores.

Ioanna T. Morfessis has been nominated by County Executive Charles Gilchrist to be director of Montgomery County's Office of Economic Development.

A. A. Kiorpes, director of fire and allied lines for Government Employees Insurance Co., has been appointed chairman of the Property Insurance Committee of the National Association of Independent Insurers.

J. Donald Rauth, chairman of the board and chief executive officer of Martin Marietta Corp., has been named to the board of directors of the People-to-People Health Foundation Inc. -- Project HOPE.

First American Savings and Loan announced these promotions: Mayo C. Harlow III, senior vice president and treasurer; Sharon L. Walker, vice president and assistant secretary; William P. DiLoreta, vice president; John McLaren, assistant vice president; and Grace Ward, assistant secretary.

John N. Weiss has been named deputy director of the division of management systems and financial statistics for the Federal Deposit Insurance Corp.

Grace Herbert has been promoted to director of federal affairs for Western Airlines. She will be based in Washington.

William Lee has been appointed director of corporate-client relations for Medical Information Management Inc.

Robert P. Mountain Jr. has been named divisonal manager for Time magazine in Washington.

Richard W. Rahn has been appointed vice president and chief economist for the Chamber of Commerce of the United States.

Leonard W. Dayton has been elected to the board of directors of Baltimore-Federal Savings and Loan Association.

Melvin Foer, co-founder of Melart Jewlers Inc, has been elected chairman of the Washington area jewelry chain. He will retain his post as treasurer.

John Campbell has retired as assistant director of the division of legislation of the Washington office of the American Hospital Association.

W. Ralph Snyder has been appointed an assistant vice president of James W. Rouse and Co., the mortgage banking subsidiary of The Rouse Co.

James P. Clark has resigned as president, chief executive officer and director of Med-Pak Corp., of Charleston, W.Va.

Arthur M. Roberts has been named chief financial officer and assistant treasurer of National Public Radio.

Leon Malnick has been appointed vice president and life insurance sales manager of Polkes and Goldberg Insurance Inc. of Bethesda.

William Lilley III has been named vice president for CBS in Washington.

Joseph H. Launders has been elected president of the Herndon Chamber of Commerce.

A. Carl Gasperow has been elected president of the District of Columbia Institute of Certified Public Accountants.

James P. Sadler has been elected to the board of directors of The Arundel Corp.

Beverly R. Williams has joined the Oliver T. Carr Co. as a commercial leasing agent for the commercial leasing division.