I got the article off of Fisheaters.com which is a pretty orthodox website. Maybe you can do a websearch and let us know. I would be interested.
Searching on Charles II of Anjou (there were several of them) produced one with a son named Ludovico, Bishop of Toulouse. (The French city, not the Spanish.)
It linked to an article in Wikipedia, which identifies St. Louis of Toulouse as the Bishop for which the California Mission was named -- indicating that the Spanish Missionaries translated the name into Spanish, and the reference is not to Tolosa, Spain at all.
Tolosa, Spain, is not a Bishopric. Still leaves me wondering who we saw in Tolosa.