Mr. Levitt is survived by his wife of 58 years , the former Joan Levy ; two sons , Peter , of Boston , and John , of Sarasota , Fla. ; two daughters , Kathryn Wells , of Lexington , Mass . , and Laura Levitt Beaudry , of Belmont , Mass . ; six grandchildren ; and two sisters , Ann Brenner , of Winston-Salem , N.C. , and Dorothy Engelhardt , of Dayton , Ohio .