I posted a reply to this citing sources & documentary evidence, but strangely it has been deleted...
Basically, too many people groups from too many eras across too many cultures, languages, and countries have documentary evidence of their descent from Odin for it to have been made up. Look up Guala/Hvala/Hawala, his genealogy documents the long line of descent from Thor to Odin.
My own genealogy corroborates the Odin genealogies but I am not descended from Odin (Odin is some kind of ancient great uncle to me). My common ancestor to Odin is Milesius 3,000 years ago. The genealogies diverge & corroborate at nearly every generation, e.g., the Smith clan is not descended from Odin either, but my common ancestor to the Smiths (M'Gowans) is about 1,500 years ago.
Back in those days names were often titles, and they were used and reused all over the place. You can't really trust modern scholars when they say that Tacitus "may have" referred to Odin, since the Odin who was worshipped by the Norsemen is very well known to history.
You should study your family history, you just might discover the secrets of the world at a library near you.