Adam (man) is here treated as a proper name; in Genesis 5:1-5 it is an appellative.
The Chaldeans also had a tradition of ten antediluvian patriarchs or kings, beginning with Alorus and ending with Xisuthrus (Hasis-Adra), the hero of the Flood. They made the duration of this first period of human history 432,000 years. Remembering that Abraham, the Hebrew, was from “Ur (Uru, the city) of the Chaldees,” we can hardly suppose the two accounts to be independent of each other. The comparative simplicity and, above all, the decided monotheism of the Hebrew relation, give a high probability to the assumption that it represents a more original form of the tradition.
Sheth, Enosh. — Those who have imagined the present list to be a mere duplicate of that given in Genesis 4:17 sqq., and who explain the whole by the fatally easy process of resolving all these different names into a capricious repetition of one original solar figure, are obliged to admit a difficulty in connection with the names of Sheth and Enosh, which are acknowledged “not to belong to mythology at all” (Prof. Goldziher). Considering that most Hebrew names have a distinct and intentional significance, it is obviously a mere exercise of ingenuity to invest them with a mythological character. Meanwhile, such speculations cannot possibly be verified.