David, how can a sainted cardinal sign a document? The sancta is with the name of the church. Historically cardinals could also be tied to a church rather than a diocese. And there are dozens of churches called "San©ta Maria". This might mean that the Moriae was added as a one off identifier. "The cardinal of the Santa Maria church, the one of Moria."
One of the other cardinals has something similar: he is of "saint Eustachius next to the temple of Agrippa". I assume that "next to the temple of Agrippa" is not part of the official christian name, so they are working with clarifications.
One of the other cardinals has something similar: he is of "saint Eustachius next to the temple of Agrippa". I assume that "next to the temple of Agrippa" is not part of the official christian name, so they are working with clarifications.