Don't worry so much about which God is which in all the Pantheons, go by the names on the JOS website.I understand your curiosity, I too wondered the same thing at first. The best answer I can give you is do some research, in books and online, and you'll see similarities between the Gods' attributes in different cultures.From then on you can put some pieces together. Keep in mind that a lot of the information is sadly corrupted.Again I stress that you shouldn't obsess too much about this...
To give you an example, Shiva and Shakti are names for Satan and Lilith. But they also represent the male and female aspects of the soul...
Hail Satan!Hail All the Powers of Hell!
Malpirgi Zodinu