Abraham Isaac "Abe" Lang, 48, a former Montgomery County resident and businessman who was a founder of a multimillion-dollar mattress retail chain based in Texas, died Oct. 17 at a hospital in Dallas after a heart attack. A resident of Aventura, Fla., he was in Dallas to visit relatives and conduct business.

Mr. Lang, a former Rockville, Gaithersburg and Hyattsville resident, lived in the Washington area for 30 years before 1992, when he moved to Dallas and became a founder and president of Mattress Giant Corp. He sold the company four years later, but rejoined Mattress Giant in September as an executive vice president in charge of real estate.

The company operates 173 stores in 11 states.

He was born in Brooklyn, N.Y., and raised mainly in Montgomery County. He attended the Hebrew Academy of Greater Washington in the District and graduated from Northwestern High School in Hyattsville.

He engaged in a number of business activities in the Washington area in the 1970s and '80s, including buying, reorganizing and selling restaurants. He also was a regional manager for Mattress Discounters in Rockville for about five years in the late 1980s and early 1990s.

His marriages to Gloria Lang, Sharon Lang and Carol Lang ended in divorces.

Survivors include his wife, Toni Bishop Lang of Aventura, Fla.; three children from his second marriage, Jennifer Lang, Joshua Lang and Jamie Lang, all of Gaithersburg; his parents, Morris Lang and Pearl Wizenfeld Lang of Coconut Creek, Fla.; a brother, Philip Lang of Dallas; and a sister, Sarah Leah Dekelbaum of Potomac.