Ms. Margaret-Hope Womble Smith of Owing Mills, Md., Mr. and Mrs. William Keller Smith of Richfield, Ohio, announce the engagement of their daughter Miss Raleigh-Elizabeth Keller Smith to 1st Lt. William Hunter Duttweiler, son of Mr. and Mrs. Larry Leonard Duttweiler of Clermont. The bride-elect is the granddaughter of the late Col. and Mrs. Phelps Raleigh Womble of Inverness, Ala., and Mrs. Jean Horn Smith and the late Mr. Franklin Keller Smith of Upper Arlington, Ohio. She is a 2000 graduate of Phillips Academy in Andover, Mass.