Karl: Name day
Name Day List: Karl
| Country | Day | Month | Names |
 Denmark | 28 | January | Carolus, Karl, Magnus |
 Estonia | 28 | January | Kaarel, Karel, Karl, Karli, Kaarli, Kaaro, Karro, Kalle |
 Norway | 28 | January | Karl, Karoline |
 Sweden | 28 | January | Karl, Karla |
 Austria | 2 | March | Agnes, Karl |
| Austria | 3 | June | Hildburg, Karl, Silvia |
| Austria | 12 | August | Karl, Radegunde |
| Austria | 21 | October | Karl, Ursula, Ulla |
| Austria | 4 | November | Karl, Karla, Modesta |
 Germany | 4 | November | Karl |
 USA | 4 | November | Amory, Cara, Carl, Carla, Carley, Carlo, Carlos, Carly, Carol, Carolina, Caroline, Carolyn, Carrie, Carroll, Charles, Charlie, Chaz, Chuck, Emery, Karl, Karla, Karlee, Karli, Karly |
Name Day List - similar names (Karl)
| Country | Day | Month | Names |
 Latvia | 28 | January | Karlis, Spodris |
| Latvia | 12 | February | Karlina, Karline, Lina |
 Croatia | 3 | June | Karlo Lwanga |
| Estonia | 20 | June | Karola, Karoliine, Karolin, Kaari, Karlotte, Lota |
| Latvia | 21 | June | Egita, Emils, Karla, Monvids |
| Croatia | 4 | November | Karlo Boromejski, Dragutin, Drago |