Huggin and Munnin are Odin's two ravens, "thought" and "memory" being the meaning of their names and always sitting on his shoulders. They scour the world for news and bring them to Odin, replacing the functionality of his lost eye (the one that he traded for knowledge).
The wolves are named Geri and Freki, both names meaning "the ravenous" or "the greedy" and seem to be symbols of the warrior's might.
https://en.wikipedia.org/wiki/Huginn_and_MuninnOdin, der Göttervater. - by Carl Emil Doepler (1880):