I just brought forward Hilgenfeld's arguments in favor of Marcion being a diminutive form of Marcus in Greek. Now I have realized also that Marcion is also a diminutive of Mark in Syriac (actually it is something that a professor of Semitic languages showed me years ago in university but I somehow pushed it to the back of my mind).
Marqiyon would be (theoretically at least) the diminutive of Marqos. In other Aramaic dialects it would Marqai or Marqon. I think Marcion was a name originally established in Syriac or Aramaic and then translated into Greek. The first witness is Polycarp; Polycarp was a native Aramaic speaker as was Irenaeus (more on that later).
Stephan Huller has had a life long interest in religion and spirituality 
dating back to conversations with his grandfather, Gaston Frank. "He said we represent one of the last descendants of the Frankist Jewish faith in the world," he muses. "I grew up thinking that our family was something like the Last of the Mohicans."