Aaron Berstein, 81, a partner in the Bernstein Bros. real estate management firm in Arlington for 35 years, die of congestive heart failure Friday at Washington Hospital Center.

Mr. Bernstein was born in Pinsk, Russia. In 1921, he came to the United States and settled in New York City, where he worked in the building industry. He moved here in 1929 and was a merchant until 1945, when he and his brother, Samuel, established a real estate management firm.

He served as president of the Combined Congregations of Greater Washington and was president for many years of Ohev Sholom Talmud Torah Congregation here, which gave him its "Crown of a Good Name" award.

He also received an award from the Union of Orthodox Jewish Congregations of America.

Mer Bernstein was a member of the Northern Virginia Home Builders Association, a 32nd degree Mason and a member of Almas Temple.

Besides his brother, Samuel, of Bethesda, survivors include his wife of 60 years, Fruma, and a daughter, Edith A. Karl, both of Washington; another brother, Nathan B., and a sister, Sylvia Farr, both of Miami, Fla., five grandchildren and a great-granddaughter.

The family suggests that expressions of sympathy be in the form of contributions to Ohev Sholom Talmud Torah Congregation in Washington.