Life of Fabius by Plutarch
I. Family Origins
A son of Hercules and a nymph, or some woman of that country, who brought him forth on the banks of Tiber, was, it is said, the first Fabius, the founder of the numerous and distinguished family of the name. Others will have it that they were first called Fodii, because the first of the race delighted in digging pitfalls for wild beasts, fodere being still the Latin for to dig, and fossa for a ditch, and that in process of time, by the change of the two letters they grew to be called Fabii. But be these things true or false, certain it is that this family for a long time yielded a great number of eminent persons.