Perhaps a detailed explanation of plagiarism would be helpful--something even a bit more elaborated than a mere definition.
Wiki on plagiarism
Indiana University student FAQ on plagiarism
University of North Carolina Student fact sheet on the big P
I seem to recall a very rough rule of thumb was 'seven or more words' in a coherent phrase, so similarity of single words or names would not be in itself sufficient evidence to prove the dastardly deed.
Then again, in the artistic world, imitation is said to be evidence of the finest form of flattery.