Here, you will find material providing definitions (e.g., dictionaries), background information (e.g., encyclopedia and handbooks or companions), as well as biographical information (e.g., who's who's) and suggestions for scholarly literature (e.g., bibliographies and indices). Keep in mind that these works focus on gender history, the history of sex, and/or women's history but you should also look in works focused on the history of specific spaces or periods.
This page has a lot on it. You can use the following anchors (links down the page) to jump straight to a relevant box.
A Companion to Gender History by 
The Oxford Handbook of Women and Gender in Medieval Europe by 