Kaarel, Karel, Kare, Carl, Carlo, Carlos, Karl, Garl, Karli, Karla, Kaaro, Karro, Kalle, Kaarli, 

Kaarle, Karle, Karo, Karlo, Karlos, Karlis, Kari, Karri, Karry, Garri, Garry, Charles, Charlie, Kaalep, Gary, Karim, Gaute