The Comescu Family was a family of organized crime based in Romania. They lived beside the Black Sea. When OSS Agent George Callen was still alive he killed five members of the Comescu Family--who then killed him in revenge. His daughter Clara Callen ran away with G. Callen and Amy Callen to the US and lived in Los Angeles for an undetermined amount of time before returning to Romania, changing her name and going into hiding. It was there at the Black Sea Beach that Clara was assassinated by the Comescu's family assassin.
In 2010 a watcher for the Comescu Family was monitoring G. Callen at his sister's gravesite. He took pursuit after the watcher and took a picture of two guys in the car. He later found out it was the assassin who took out his mother, Clara and Dracul Comsecu in the car.
In 2012 G. Callen and his team went to Prague to rescue Hetty Lange and in the process ended the rest of the family but Dracul Comescu escaped. He eventually hunted down Dracul Comescu in Hawaii with the Five-O team and ended the blood feud until 2013 when his brother Vasile who also surived the massacre against his own family was targeting Callen's father until Callen and his team finish Vasile as well. In 2019 when Callen was looking for his father he discovered that Nikita Alexander Reznikov had hunted the Comescus for killing his wife Clara. Reznikov murdered a couple without realising they had a son called Darius. Nikita adopted Darius, whom Callen meets when they both attempt to rescue Nikita. Nikita, however, is killed, and Callen retreated separately from Darius due to a gas exposure set by Nikita's captor Pavel Volkoff.
Darius Comescu - Reznikov: Adopted
Ilena Comescu: Defected
Alexa Comescu: Head of the family and deceased
Dracul Comescu: Deceased
Vasile Comescu: Deceased
Petru Comescu: Deceased
Ion Comescu: Deceased
Grigorie Comescu: Deceased