Vartan could be great for a character name. The character could have a sister or partner character that also means rose or something of the like, Nasrin or Vardo for example.
Actually, Vartan is the name of an important character in the very famous Armenian novel Khent (The Fool). He is the main hero of the story and lover of Lila, who he tries unsuccessfully to rescue. The novel`s influence on Armenian culture could be why it is so popular among Armenians today. They don`t mention his siblings, though.