Dorothy H. (Todd) Donnellan, age 87, a lifelong Billerica resident, died Thursday, June 3, 2010 at Lowell General Hospital after a brief illness. She was the beloved wife of the late Robert E. Donnellan. Born in Billerica, October 23, 1922, she was the daughter of the late Forrest and Etta (Brown) Todd. She was raised in Billerica and was graduated from Howe High School. Dot retired from the First Bank & Trust in the North Billerica office as an Assistant Vice President after 25 years of service. Prior to her employment at First Bank & Trust, she worked for many years as a bookkeeper and confidential secretary in Wellesley Hills, MA. Mrs. Donnellan, a longstanding and active member of the Unitarian Church in Billerica, served on many committees during her membership. She is survived by her three sisters, Ethel Todd Nicholls of St. Louis, Missouri, Marion Palmieri of Billerica, and Nancy Todd Morrell of Chelmsford. She also leaves many loving nieces and nephews. She was also the sister of the late Charles Todd and Rhoda Todd Wells.