Another St. Arnold was a Greek active in the court of Charlemagne around 800.

Arnulf of Metz was bishop of Metz and adviser to the Austrasian court. He is cited as patron saint of brewing.

Arnold of Soissons was a monk and later bishop of Soissons. He is also cited as a patron saint of hop pickers and Belgian brewers.

Saint Arnold Brewing Company

Saint Arnulf

Saint Arnaud

Saint Arnold is an honorific name that can refer to several different Roman Catholic saints.