Probably no use to you now but I know alot about greek mythology, norse not as much.
Zeus-King of the gods. God of lightning, law, justice, sky and heavens. Symbols-Lightning and eagles.
Hera-Queen of the gods. Goddess of marriage, pregnant women and family. Symbols-Cows and peacocks.
Poseidon-God of the seas, oceans, fresh water and horses. Symbols-Trident, dolphins and horses.
Demeter-Goddess of agriculture and harvests. Symbols-Barley and grain.
Apollo-God of prophecy, music, medicine and the sun. Symbols-the lyre, sun.
Artemis-Goddess of the hunt, maiden girls and the moon. Symbols-moon, bow and arrow.
Ares-God the war. Symbol-boar and bloody spear.
Athena-Goddess of battle strategy, wisdom and craft. Symbols-owls and olive trees.
Hephaestus-God of forges, metalwork, fire and craftsmen. Symbols-Anvil, fire and hammer.
Aphrodite-Goddess of love and beauty. Symbols-dove and girdle.
Hermes-God of travel, travellers, thieves, roads and messenger of the gods. Symbols-Caddeaus and snakes
Dionysus-God of wine, grapes and festivals. Symbols-grapes and tigers.
Those above are the 12 olympian gods but their are 2 other main gods listed below.
Hades-God of underworld, dead and wealth. Symbols-Helm of darkness and treasure.
Hestia-Goddess of the hearth and home. Symbol-Fireplace.
This is the basics. If you need more info on what they did please message me. Hope this helped.