1) Catholic ecclesiastical title 2) Ecclesiastical title 
Latin, meaning: stenographer (class.), notary, legal scribe. 
A notarius is a public secretary who is appointed by competent authority to draw up official or authentic documents (compare English `notary`). In the Roman Catholic Church there have been apostolic notaries and even episcopal notaries. Documents drawn up by notarii are issued chiefly from the official administrative offices, the chanceries; sec.....[genus] Notarius is a genus of sea catfishes found in marine, brackish and fresh waters along the Atlantic and Pacific coasts of Central and South America. There are currently 12 recognized species in this genus. ...
A secretary or clerk who kept the minutes of meetings. He was often promoted to senior office very rapidly. 
stenographer (class.), notary, legal scribe.