What is the source of the allusion in the sentence below?
Before Mona had even met her future husband in person, she knew about his reputation as a Romeo.

 - literature
 - Roman mythology
The source of the allusion Romeo is literature.
In William Shakespeare's Romeo and Juliet, Romeo is known for the eloquent declaration of love with which he woos Juliet.
The allusion Romeo means a man who is very romantic.