I think English names are usually translated to Chinese according to their pronunciations. Some common names have been translated and used, but the others don't have the generally acknowledged translations. "Katjia" was translated to "卡佳" (ka jia) in a novel by some translator. "Moger" is not found by me. According to its pronunciation, I think it can be translated to "摩哥" (mo ge).

For this name I would translate by sound as "卡提雅 摩格尔＂, Pinyin is ------ 卡 (ka) 提 (ti) 雅 (ya) 摩 (mo) 格 (ge) 尔 (er) I'm not sure if u like it or not :)