Namesakes for Placidus

Other Royalty: 1 prince
      Johann II, Prince of Liechtenstein (a.k.a. Placidus)   1858-1929   Liechtenstein  
Saints: 3 saints
      Saint Placidus   ?-3xx  
      Saint Placidus   ?-541  
      Saint Placidus of Autun   ?-675