What is Elizabeth Blackwell Middle Name?

Is this a trick question? If it’s referring to the Dr. Elizabeth Blackwell that was born in Gloucestershire, England in 1821, she does not have a middle name. Actually, most females born in that era did not have middle names, they were just expected to use their maiden name as a middle name after they got married. If this question refers to any other Elizabeth Blackwell, you may want to just ask her mother about her middle name.