Obituaries of residents from the District, Maryland and Northern Virginia.

David B. Stewart, geologist

David B. Stewart, 86, a geologist with the U.S. Geological Survey whose specialties included radioactive waste, died April 12 at a hospital in Fairfax County. The cause was complications from a fall, said his wife, Odette James.

Dr. Stewart, a resident of Reston, Va., was born in Springfield, Vt. He joined the Geological Survey in 1948 as a summer assistant and retired in 1995.

Marva W.H. Cooper, music professor, pianist

Marva W.H. Cooper, 73, a music professor at the University of the District of Columbia and a professional pianist, died April 20 at a hospital in Washington. The cause was a pulmonary hemorrhage, said a daughter, Jeanine Cooper-Taylor.

Dr. Cooper was born Marva Wyvonne Harper in Muskogee, Okla. She was a music instructor at Fisk University in Nashville before moving to the Washington area in 1968. In 1971, she joined the faculty at what then was Federal City College, a predecessor institution of UDC. She was a music professor and departmental chairwoman at North Carolina Central University from 1997 to 1999, then returned to UDC, where she was a music professor until her death.

Ganka S. Gabrovska, Bulgarian author

Ganka S. Gabrovska, 81, a Bulgarian author and novelist who co-founded and taught at the Bulgarian Education and Culture Center in Washington, died March 31 at a rehabilitation center in Washington. The cause was complications from a stroke, said a friend, George Walser.

Ms. Gabrovska, a District resident, was born in Burgas, Bulgaria. She was an editor for a Bulgarian literary journal, deputy editor in chief for a Bulgarian literary newspaper and wrote novels, plays and books under the pen name Lada Galina.

Helen ‘Lynn’ Beadel Latos, homemaker

Helen “Lynn” Beadel Latos, 86, a homemaker and recreational golfer and bridge player, died April 17 at a hospital in Washington. The cause was complications from a fall, said a daughter, Sandra McAlister. Mrs. Latos, a Silver Spring resident, was born Helen Bailey in Rolla, Mo. She settled in the Washington area soon after high school.

Valerie Jean DeFillipo, family planner

Valerie Jean DeFillipo, 63, an advocate for family planning and women’s reproductive rights and health who most recently was executive director of Family Planning 2020, died April 16 at her home in Washington. The cause was cancer, said her husband, Yannis Pasparakis.

Ms. DeFillipo was born in South Plainfield, N.J., and was executive director of Planned Parenthood in Miami before moving to the Washington area in 1997. She was founding director of Planned Parenthood Global Partners and had other family planning positions in Washington and in London before being named executive director of Family Planning 2020 in 2013. The organization is a global partnership advocating the right of women to make their own reproductive and family planning decisions.

Morris G. Sahr, financial consultant

Morris G. Sahr, 86, a retired financial consultant who earlier had been proprietor of a Northern Virginia toy store, died April 19 at a health-care center in Bethesda. The cause was complications from Alzheimer’s disease, said a daughter, Evelyn Sahr.

Mr. Sahr was born in Schenectady, N.Y., and settled in the Washington area in 1955. In the early 1960s, he operated a toy store near the Seven Corners Shopping Center in Falls Church. He was an independent financial consultant from the late 1960s to the late 1990s, when he retired and moved to Charlottesville. He settled in Bethesda about seven years ago.

— From staff reports