Johnson, Elisabeth J. “Betty” (Gill), PhD, of Cambridge, October 16, 2016. Beloved wife of the late E. Leslie Johnson. Devoted mother of Alan Johnson, his wife Kathleen, Joan E. Johnson and Linda J. Johnson, all of Cambridge. Loving grandmother of Kirsten Johnson. Sister of Margery Simpson of Dorchester and the late Carol Johnson. Further survived by many loving nieces, nephews and friends. At Betty’s request, all services will be private.