Abraham Einhorn, a playwright whose first play, “Agatha Sue I Love You,” was produced on Broadway by George Abbott in 1966, died on May 4 in Laughlin, Nev., of cardiac arrest. He was 85.
Mr. Einhorn summered in East Hampton and lived in Laughlin during the winter.
He was born on May 30, 1925, in New York City, one of two sons of Samuel and Pauline Einhorn. He grew up on the Lower East Side. He lived in Amawalk, N.Y., from 1950 to 1989.
In 1938 he married his childhood sweetheart, Rena Gatti, who died in 2007.
Mr. Einhorn served in the Navy on Okinawa during World War II.
After returning to New York he began his career in the theater, spending 30 years backstage on some of the longest-running plays on Broadway, according to his children, who also wrote that he enjoyed walking, reading, gambling, and writing.
Mr. Einhorn wrote many plays and, in later life, enjoyed writing one-act plays.
Mr. Einhorn is survived by his daughter, Janice Robinson of East Hampton, his son, Richard Einhorn of Tampa, Fla., his brother, Jerry Einhorn of Delray Beach, Fla., and two nephews and a niece.
Mr. Einhorn was cremated; his ashes will be buried with his wife’s in the family plot in Amawalk.
A celebration of his life will be held in Laughlin, Nev., on May 30.