"Oh Romeo, Romeo, wherefore art thou Romeo?"

Juliet is asking where is Romeo.  She loves Romeo and she is saying that she is willing to give up her name Capulet to be with Romeo. Before she does this she wants to speak to Romeo and be sure she is loved back.  She goes on to ask herself what meaning a name has. She is saying that the name itself is her enemy not the actual person. I think she is trying to make a point about the feud is just attached to the name which is attached to the person.  The feud isn't her and shouldn't define the love she feels. The love is more important.