Donald John Looft, 63, a retired executive vice president of the Magnavox Government and Industrial Electronics Co. and a retired engineer with the Defense Department, died of cancer Oct. 19 at Fairfax Hospital.

Mr. Looft, who lived in Alexandria, was born in Ledyard, Iowa. He graduated from George Washington University, from which he also received a master's degree in engineering management. During World War II he served in the Army.

In 1946 he moved to the Washington area and became a civilian employe of the Army Department's Engineers' Research Development Laboratory at Fort Belvoir.

Mr. Looft transferred to the Army's Night Vision Laboratory in 1968 and became the director. In that job, he helped develop the common module approach to the manufacturing of sophisticated night vision equipment.

He transferred to the Defense Department in 1975 and became the deputy director of the Defense Advance Research Projects Agency. He retired in 1978 and joined Magnavox, where he worked until his death.

Mr. Looft had received three meritorious civilian service awards from the Army Department, including the Commanding General's Medal for Leadership in 1959.

He was a member of the Defense Science Board and a founding member of the Washington Farm United Methodist Church in Alexandria.

Survivors include his wife, Helen T. Looft of Alexandria; two daughters, Nikki Lowry of London and Christel Bolgiano of Wheaton; one son, David Looft of Alexandria; his mother, Mrs. Edward Looft of Led-yard; two sisters, Beulah Cerney of Elko, Minn., and Cleo Mather of Swea City, Iowa, and four grandchildren.

JAMES J. MADDEN,

83, the founder of James J. Madden Inc., mechanical contractors in Washington, died of a heart ailment Oct. 19 at Sibley Memorial Hospital.

Mr. Madden, who lived in Washington, was born in County Roscommon, Ireland.

He came to the United States and the Washington area around 1920, and he found work as a plumber's apprentice. Later he was a partner in the Daily and Madden Plumbing Co. About 1940, he founded the company that eventually became James J. Madden Inc.

He managed the business until he retired about 10 years ago.

Mr. Madden was a past president of the Ancient Order of Hibernians, a past president and director of the Washington Master Plumbers Association and a member of the Mechanical Contractors Association.

His wife, Suzanne Madden, died in December.

Survivors include two sons, Dr. James J. Madden Jr. of Nashville, and John P. Madden of Chevy Chase; one daughter, Suzanne M. Holt of Darnestown, and eight grandchildren.

EMILY LIGON FOLEY,

87, a resident of the Washington area since 1941 who was active in volunteer organizations, died of cardiac arrest Oct. 19 at her home in Washington. She had a summer home in Newport, R.I.

Mrs. Foley was a Red Cross Gray Lady during World War II and she served on the boards of the Visiting Nurse Association and the Frontier Nursing Service. She was a life member of the Women's Committee of the National Symphony and a member of the National Society of Colonial Dames.

She was born in Montgomery, Ala., and she attended Wellesley College.

Her marriage to George Temple Bowdoin ended in divorce. In 1941, she married Edward H. Foley, who was an undersecretary of the Treasury during the Truman administration. Mr. Foley died in 1982.

Mrs. Foley's survivors include three daughters by her first marriage, Aileen B. Train of Washington, Helen B. Spaulding of Manchester, Mass., and Julia B. Key of Locust Valley, N.Y.; 10 grandchildren, and 13 great-grandchildren.

YVONNE WATTS,

35, who was pronounced dead Oct. 17 at Southeast Community Hospital as a result of a gunshot wound to the chest that she received earlier in the day, was a member of the Temple of Deliverance Pentecostal Church in Washington and a lifelong resident of the city.

A spokesman for the Metropolitan Police said Ricky Brogsdale, 26, of Washington, was arrested and charged with the shooting. Police said Miss Watts was the eighth victim in a series of attacks in Southeast Washington or Prince George's County that have been dubbed "peeping Tom" shootings.

Miss Watts had worked as an office cleaner from 1983 to 1985.

Survivors include one son, Edward Ford, two daughters, Bayonia and Shevon Ford, her parents, Willie and Nettie Cunningham, and three sisters, Dorothy Ellerbe, Grace Roster, and Claudette Watts, all of Washington, and three brothers, Willie Cunningham of Plum Branch, S.C., and John L. and Elijah Cunningham, both of Washington.