11 Exhibit 23(a) Consent of Ernst & Young LLP We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the Greif Bros. Corporation Production Associates 401(k) Retirement Plan and Trust of our reports dated December 6, 1999, with respect to the consolidated financial statements and schedule of Greif Bros. Corporation included in its Annual Report (Form 10-K) for the year ended October 31, 1999, filed with the Securities and Exchange Commission. /s/ Ernst & Young LLP Columbus, Ohio September 14, 2000