She was the daughter of Isaac ben Simson ha-Kohen, and through her mother, Vögele, granddaughter of the well-known rabbi of Prague, Judah Loew ben Bezalel. As a daughter of such a distinguished rabbinical family, she acquired a wide knowledge of Hebrew and rabbinical literature, and could often assist rabbis in solving textual difficulties.
Her brothers, Ḥayyim and Naphtali, were also noted rabbis. Such erudition was quite uncommon among Jewish women of that time, and the Memorbuch of Worms makes special mention of it (Ḳobeẓ "al-Yad, iii 15, Berlin, 1887). Eva refused an offer of marriage from Isaiah Horowitz, then rabbi of Prague, who was about to emigrate to Jerusalem, although she longed to be in the Holy Land.
On the journey, Eva Bacharach died in Sofia, where she was buried with great honor.
Her grandson, Yair Bacharach, called his work in memory of her Ḥawwot Yair, which, in the usual German pronunciation, might be understood as "Eva"s Jaïr.".
