Rust Jackson-Cross, the commercial real estate and insurance firm, has restructured its Washington office with the naming of new management appointments and a company name change to Jackson-Cross Co. Realtors.

The restructuring comes after recent mergers with two Washington commercial real estate and insurance firms. The Philadelphia-based Jackson-Cross purchased the real estate and insurance firm of H.L. Rust Co. in 1981. Earlier this year, Rust Jackson-Cross merged with Brannock Associates, a commercial real estate firm.

C. Duke Brannock was named chairman of the board and chief executive officer for leasing. He was formerly president of Brannock Associates. Joseph Anastasi was named president and chief executive officer for investment properties. He was formerly head of real estate of Rust Jackson-Cross.

William Simons was named president of Rust Jackson-Cross Insurance Associates, the insurance arm of Jackson-Cross. He was formerly senior vice president of H.L. Rust Co. William Danielson was named treasurer. He was formerly comptroller of Rust Jackson-Cross. Michael Cottle was promoted to vice president for property management of Jackson-Cross.

All five company officers were named to the Jackson-Cross board of directors.

Jackson-Cross presently leases and manages about 1 million square feet of space in the Washington area, and about 9 million square feet in Philadelphia and Wilmington, Del., a spokesman said.