Circoviridae is a family of small, non-enveloped, circular DNA viruses that infect a variety of animals including birds and pigs. There are several synonyms for this family of viruses, including circovirus, beak and feather disease virus, and chicken anemia virus. These viruses are known for their ability to cause a wide range of diseases and syndromes, such as immunosuppression and anemia. While research continues to uncover new information on Circoviridae and its many impacts on animal health, it is important to recognize and understand the various synonyms associated with this complex virus family.