A freeze frame of the articles that Dr. Massey looks up about Sister Josepha online reveal the following things about her: Her younger sister's name was Denise They were abandoned as infants She and her sister grew up at an orphanage in New South Wales called The Lord's House Sister Josepha got her bachelor's degree at Kings Theological Seminary in Ottawa, Canada and graduated with valedictory honors She went on to attend the Oxford School of Advanced Religions Studies at Oxford College in England Her sister Denise joined the following of a self-proclaimed messiah and committed suicide along with the rest of the cult.
Again in reference to the articles Dr. Massey looked up online, Sister Josepha is once credited as, "Isabela Josepha Montafiore". This could mean possibly one of two things: that her name was first Isabela before becoming a nun and then changed it to Josepha, or her first name is Isabela and she chooses to go by her middle name, Josepha.