The most obvious origin of the nomen of the great Cæcilian gens would be cæcus (blind); in fact Cæcilia means a slow-worm, as that reptile was supposed to be blind; but the Cæcilii would by no means condescend to the blind or small-eyed ancestor; and while some of them declared that they were the sons of Cæcas, a companion of Æneas, others traced their source to the founder of Præneste, the son of Vulcan, Cæculus, who was found beside a hearth, and called from caleo (to heat), the same with καίω (to burn).  There was a large gens of this name, famous and honourable, though plebeian; but rather remarkably, the feminine form has always been of more note than the masculine. (History of Christian Names, Yonge, 1884)