Well known?

It seems that I am kinda well known in the biotechnology and Medical bioscience course.
I don't know is it a good thing or not, and I don't know am I well known for negative aspects or positives ones.

When I went to "I'm Shy" 's pre-birthday gathering, A guy which shares the same course are there too. While introducing myself, that guy states that he already know my name. Feels kinda bad when people know your name but you don't know theirs.

When I question them where they heard my name, they would be twisting around. So I would assume the worst~!