[Cronos]

I guess huck you mean that we transliterate a name into English. That's true. And it's true for most languages. Take John, in English.

In Hebrew it is Yohanan, in Greek Ioannes as in Latin.

But if you look in Italy it is Giovanni, in German Johan or Hans, in Scandanavia and Poland Jan or Ivan, in Irish Sean, in French Jean, in Magyar Janos

[annalex]

Mark, Marcus is specifically Latin name, given after Marcus, the Roman god of war. St. Mark the Evangelist's Hebrew name was in all probability John and Mark used as surname, see Acts 12:12. See also Wiki and Catholic Encyclopedia

Luke, Lucas, is Greek, and St. Luke was Greek by origin, so it is probably the actual name of the Evangelist.