Wearing her mother's wedding gown of candlelight heirloom satin and imported French bridal lace, Katharine Elisabeth Finnegan was married to Donald Winthrop Sweeny at half after five o'clock on Saturday, June 20, in the garden of the Finnegan home in Potomac, Md. The Rev. John Parker Coleman joined in marriage the daughter of Mrs. Marcus Bartlett Finnegan and the late Mr. Finnegan to the son of Mr. and Mrs. Charles T. Sweeny of Quincy, Mass.

Attending the bride as maid of honor was Patricia Hunt of Sumner, Md. and the bridesmaids were Nancy Lee Finnegan of Champaign, Ill. and Mrs. William Clark Smith of Providence, R.I., sisters of the bride; and Elizabeth Grant of Brewster, Mass. Meredith Arrington Smith, cousin of the bride, of Dallas, Tx. served as flower girl.

Mr. Sweeny had as his best man, David C. Wulf of Redondo Beach, Cal. Serving as ushers were brothers of the groom, Thomas W. Sweeny of Randolph, N.H.; John B. Sweeny of West Townsend, Mass., and Airman 1C Robert H. Sweeny of London, England.

Following the ceremony a cocktail-buffet reception was held at Congressional Country Club with music by Bob Israel and his Quintet. After a honeymoon in Maine, the couple will reside in Boston, Mass. where Mrs. Sweeny will continue her association with the Kaji Aso Studios and Mr. Sweeny his studies and career in music as a song writer and performer.