What is Nikolai tesla middle name

No one knows if he has a middle name but people are still researching if he had a middle name. there is a page that has his info but people cannot read it very well.

Inventor Nikola Tesla was born in July of 1856, in what is now Croatia. He came to the United States in 1884 and briefly worked with Thomas Edison before the two parted ways. He sold several patent rights, including those to his alternating-current machinery, to George Westinghouse.