Elena Kagan does not have a middle name. This is because her parents chose to only give her a first and last name. This is a common practice in many cultures, and it is not considered to be a disadvantage in any way. In fact, some people argue that it can be an advantage, as it can make a person's name more memorable.
The Remarkable Journey of Elena Kagan: A Quiz on the Trailblazing US Supreme Court Justice