And if you've wondered about the use of a middle name, then this article might be of interest. It seems that it was very useful to Edward Snowden, the famous whistleblower: Edward Joseph Snowden, or Edward James Snowden, or Edward J Snowden. This confusion, according to the Hong Kong government, led to Snowden leaving the city despite a request from the United States for his arrest. http://www.bbc.com/news/magazine-23097107
For my part, I tend to forget my two middle names, as I don't usually have enough space to write them all and want to save myself writer's cramp!