Wolfgang Händler is a name of a person. He is probably a man who is known for something he has done or achieved.
Imagine you have a best friend named Sarah who is very good at painting. She can mix colors and create beautiful pictures. Similarly, Wolfgang Händler may be very good at something else.
Maybe Wolfgang is a scientist who studies plants and animals. He spends a lot of time observing them, testing them, and learning about their behavior. He might have even written books or given talks to share what he knows with others.
Or maybe Wolfgang Händler is an artist, just like your friend Sarah. He might paint pictures, sculpt statues or create other beautiful things that make people happy.
All in all, Wolfgang Händler is a person who has made a name for himself in a particular field. Just like your friend Sarah is known for her painting skills, Wolfgang is known for his talents in a particular area of work.