EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 33-22219) of Zenith National Insurance Corp. of our report dated JuneĀ 26, 2007 relating to the financial statements and supplemental schedule of The Zenith 401(k) Plan as of DecemberĀ 31, 2006 and 2005, and for the year then ended DecemberĀ 31, 2006, which appears in this Form 11-K.
/s/ PricewaterhouseCoopers LLP
Los Angeles, California
June 28, 2007