""Jacaré" means alligator which is the symbol of the ASLE jiu-jitsu and judo team, a team where Ronaldo first started competing in combat sports. Souza was ASLE's most prolific competitor, living inside the gym for a big part of his life while also helping the coaching of others. Due to his strong ties with the academy, some started calling him Jacaré. Many also call him "Jaca" which is short for Jacaré."