Hello,
Considering I don't know what text you're referring to, I'll just answer the question as defining it.
A refugee can be defined as a person who is forced to leave their country to escape war, persecution, or a natural disaster.
Answer:
He hates it because it is Juliet's family's foe, and is willing to change it to please her
Explanation:
Romeo suddenly hates his name because he discovers that his name is the same as the name of the foe of Juliet's family.
He is displeased when he learns of this and is willing to change his name so that he can please his lover, Juliet.
He is an example of a Dynamic Character