As regards his marriages and offspring, historians are at variance. Some say that he had no other wife than Tatia, and no other child than one daughter, Pompilia. Others ascribe to him four sons besides, Pompon, Pinus, Calpus, and Mamercus, each one of whom was the founder of an honourable family.
From Pompon the Pomponii are descended, from Pinus the Pinarii, from Calpus the Calpurnii, and from Mamercus the Mamercii, who for this reason had also the surname of Reges, or Kings.
But there is a third class of writers who accuse the former of paying court to these great families by forging for them lines of descent from Numa, and they say that Pompilia was not the daughter of Tatia, but of Lucretia, another wife whom Numa married after he became king.
However, all are agreed that Pompilia was married to Marcius. Now this Marcius was a son of the Marcius who induced Numa to accept the throne.1
That Marcius accompanied Numa to Rome, and there was honoured with membership in the Senate. After Numa's death, he competed for the throne with Hostilius, and being defeated, starved himself to death. But his son Marcius, the husband of Pompilia, remained at Rome, and begat Ancus Marcius, who succeeded Tullus Hostilius in the kingdom.
This Ancus Marcius is said to have been only five years old when Numa died, not a speedy nor a sudden death, but wasting away gradually from old age and a mild disorder, as Piso writes. He was something over eighty years old when he died.