Believe it or not, people who go by shorter names tend to earn more money than those who don't. According to one analysis of nearly 6 million names by career site TheLadders, every extra letter in your first name can correspond to a $3,600 drop in annual wages. If you're debating between "Sam" and "Samantha," that's a big difference.
LinkedIn has conducted similar research showing that the most popular CEO names worldwide — Peter, Jack, and Fred — are either short names or shortened versions of names. So long as your nickname sounds professional, it can help convey friendliness and openness while also earning you more money.
http://uk.businessinsider.com/surprising-things-that-affect-success-2016-4
Salaries solely depend on performance unless you are in a government job. Companies are not so stupid.