Rabbi Naftali Zvi Yehuda Berlin was the Rosh yeshiva of the Volozhin yeshiva and author if several works of rabbinic literature in Lithuania. His name is commonly abbreviated by its consonants as Netziv (נציב which can also mean "pillar"). Wikipedia
The definitive Wikipedia entry for Naftali Zvi Yehuda Berlin. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Naftali_Zvi_Yehuda_Berlin
