תולדות

תולדות toledoth

Lets use subroots:

תו (to)- mark, writing

לד (led)- child

ות (oth)- The preceding meaning distinguished as the particular object of the word. It refers to THE WRITING about the child.

Since the object of the scriptures is the Son of God. Toledoth can be understood as a the writings about the son of God.