Thus did God subdue all those who persecuted His name, so that neither root nor branch of them remained; for Licinius, as soon as he was established in sovereign authority, commanded that Valeria should be put to death. Daia, although exasperated against her, never ventured to do this, not even after his discomfiture and flight, and when he knew that his end approached. Licinius commanded that Candidianus also should be put to death. He was the son of Galerius by a concubine, and Valeria, having no children, had adopted him.
On the news of the death of Daia, she came in disguise to the court of Licinius, anxious to observe what might befall Candidianus. The youth, presenting himself at Nicomedia, had an outward show of honour paid to him, and, while he suspected no harm, was killed. Hearing of this catastrophe, Valeria immediately fled. The Emperor Severus left a son, Severianus, arrived at man's estate, who accompanied Daia in his flight from the field of battle. Licinius caused him to be condemned and executed, under the pretence that, on the death of Daia, he had intentions of assuming the imperial purple.
Long before this time, Candidianus and Severianus, apprehending evil from Licinius, had chosen to remain with Daia; while Valeria favoured Licinius, and was willing to bestow on him that which she had denied to Daia, all rights accruing to her as the widow of Galerius. Licinius also put to death Maximus, the son of Daia, a boy eight years old, and a daughter of Daia, who was seven years old, and had been betrothed to Candidianus. But before their death, their mother had been thrown into the Orontes, in which river she herself had frequently commanded chaste women to be drowned. So, by the unerring and just judgment of God, all the impious received according to the deeds that they had done.
Source: Of the Manner In Which the Persecutors Died (New Advent)