The origin of the Hungarian name
Sebestyén
has the following meaning:
From sebaste, a town in asia minor. .
The etymology of "Sebestyén"
is 
Hungarian form of Slovene Sebastijan.
This meaning also applies to these versions: Sebastyen
Other information:
 
 
Etymology is the study of the origin of words, and in this case, the origin of names. 
The word etymology comes from Greek 
etymon, "true sense of a word", and logia, "doctrine or study".