It is slightly misleading to say Jesus is the most mentioned person in the Quran.

There are a few ways you can look at how often certain people are mentioned, if you're counting how many times somebody's name is explicitly mentioned, then the most mentioned person is Moses, with his name being said about 136 times. If you're including different titles of Jesus (such as Christ, Son of Mary, etc) then he is mentioned more often than Moses. However, Muhammad is indirectly mentioned more than any other person in the Quran (4 times as Muhammad, once as Ahmed, and many times indirectly as Prophet, You, He, etc) 

That being said, however, it is interesting to see how many similarities there are among the Abrahamic religions, I found it very interesting to learn that Muslims believe in Jesus at all, and I believe we should be aware of the similarites and differences between faiths.