Robin R. Henry, former financial counselor with Merrill Lynch, has been elected president of Rau Radio Stations Inc., a Washington-based owner and operator of six AM and six FM stations in Delaware, Maryland, West Virginia, North Carolina and Tennessee and a general partner of Colonial Cablevision of Maryland. Henry succeeds her late father Henry Rau.

Gerald A. Bean, publisher of The Rockford (Ill.) Register Star, has been named executive vice president and general manager of Gansat, the Gannett Satellite Information Network. Gansat is a Gannett subsidiary with headquarters in Washington.

B. Maurice Sparby has been named publisher of The Baltimore News American, succeeding Robert E. Eckert, who resigned. Sparby was general manager of the Hearst-owned newspaper. He has held executive and editorial positions with the Scripps-Howard and Knight-Ridder newspaper chains and The Washington Post Co., for which he was publisher of The Trenton Times. "We have many exciting plans for The News American," Sparby said. "We will continue to be an integral part of the Baltimore area community and actively participate in its development and growth."

William J. MacFarland has been named vice president of W. B. Doner and Co., a Baltimore-based advertising agency.

William Conway has been appointed a vice president and the treasurer of Mci Communications Corp.

Ervin S. Duggan, a member of the policy planning staff at the State Department under the Carter administration, has joined Washingtonian Magazine as national editor. Duggan previously served in the White House as an assitant to President Johnson and was at HEW as special assistant to Secretary Califano.

Georgia Lakaytis has been appointed executive vice president and a partner of The Communicators Inc., a public relations, advertising and communications agency specializing in serving professional and trade associations. Lakaytis was previously director of public relations and advertising at the American Home Economics Association.

Joan Homa has been promoted to retail sales manager for WGMS. Joining the radio station's retail sales staff are Ellen Sternberg and Debbie Boland.

Charles S. Lerner has joined InfoServices, the public relations division of Earle Palmer Brown and Associates, as vice president for public affairs.

Celia Doremus has been named senior account executive for Poretz & Jaffe Inc.

The Dallas Morning News has expanded its Washington bureau to improve coverage of national, political and government affairs. Carl P. Leubsdorf, formerly a national political correspondent for The Baltimore Sun, was named bureau chief. He replaces John Geddie. Named as Washington editor and deputy bureau chief was Janet W. Battaile. Leubsdorf began his career with the Associated Press in 1960 where he became chief political writer and chief of its Senate staff. He went to The Sun in 1976. Battaile also started with the Associated Press, in 1969. She joined the Washington bureau of The New York Times as night editor in 1974.