Or Ole or Jacques... you get the idea, anything that sounds less Muslim and might be the name of a Christian saint.
I see what you're saying, but part of the point of Jesus' teachings is that anyone can become a Christian - you don't have to belong to particular ethnic group or tribe. In fact, Christianity is the world's fastest growing religion, especially in the developing nations, in large part because of this.
So, it shouldn't matter if the guy has an arab name. There are many arab Christians too, but Christianity does not require that you change your name or learn a new language. That is part of the advantage that Christianity has over Islam - the Bible can be translated into many languages, while in Islam only the Arabic translation of the Koran is considered to the verbatim version of God's word.