Actually, in that case, he would have taken the whole name Francis Xavier - but he took Francis, because the charge given to St. Francis (of Assisi) was “Rebuild My Church.”
Also, Francis went on pilgrimage everywhere, even going to preach to the Muslims, who were so surprised by his audacity that they didn’t even behead him (it is said that their leader did become a Christian secretly after Francis returned home). Francis is also very popular in the Eastern Church. I think he’s regarded as a “Holy Fool,” that most Russian of saints.
Francis was a great evangelizer, and of course, Latin America was evangelized by a combination of the Jesuits, the Dominicans - and the Franciscans, with the latter group probably having been the most successful.
Some people are speculating that this will have an impact on the very disorderly Jesuit order, too.
I think people should calm down. Bergoglio wouldn’t have been my first choice, but what do I know? And I think we know enough good things about him to be encouraged.
My only fear is that he won’t be strong enough to stand up to the curial monsters who basically brought down BXVI.
How could you not be encouraged, he is our pope, chosen by the Holy Spirit to guide our Church. I believe that even if the Cardinals tried to thwart the Will of God they would not be able to, so for this time and for this place he is the Vicar of Christ, chosen by the Holy Spirit.