P.S. It is the same with Markar(ian), Vartan(ian) etc. Markarian just does not know how to write his name in English correctly. I do not want to say that he were silly –– one cannot know everything. Fortunately, we can correct this mistake. We should do it, because Wikipedia should not be the slave of commonness in the internet but throw light on things. 

 P.P.S. I commit that the Armenian language is not my mother tongue but I have asked Armenians to be absolutely sure.