BARNERT-Libby Tillman. 78, after a long illness. Formerly of New Rochelle. Beloved mother of David, William and Ruth. Grandmother of Andrea, Aaron and Richard. Widow of Alan. Sister to Norman. Libby's joy, enthusiasm and love permeated everything she touched. Donations in her memory may be sent to the Brandeis University National Women's Committee, Central Westchester Chapter, which she proundly served as President: Brandeis University National Women's Committee, Central Westchester Chapter, Brandeis University, PO Box 549110, Waltham, MA 02454-9110. Funeral services Tuesday, May 7, 12 noon, at George T. Davis Funeral Home, 14 LeCount Place, New Rochelle. The family will receive visitors Tuesday evening from 6 to 9 PM, at the home of Joan and Sam Goldstein, 225 Victory Boulevard, New Rochelle.