Joanna of Castile didn’t become known as “Juana La Loca” for her sound rule. Yet to what extent was this “mad” queen a victim of greed and betrayal? From rumors of her “undead” passion for her late beau to her iconic beef against nuns, the legend of this wickedly jealous ruler just won’t die. Here’s the deranged story of Spain’s “Mad” Queen. 1. Her Dad Had IssuesBorn on November 6, 1479, Joanna was the daughter of two powerhouse monarchs: Isabella of Castile and Ferdinand II of Aragon. Her parents’ marriage would unify Spain, but during Joanna’s lifetime, Castile and Aragon had more of an icy …