In Hebrew, the name Seir (strong number 8165) also means hairy. Seir was the name of a mountain range in Edom, the land of the Edomites, and of a Horite who's descendants intermarried with the Edomites. Esau, the progenitor of the Edomites was also known for being Hairy.
Caesar could conceivably derive from Seir in some way, making this name further evidence for Edom becoming Rome.
Update: Britam responded to this theory
Perhaps Caesar comes from Kaus and Seir being merged together.
The Name of Julius Caesar in Etymology
Disclaimer, I of course do not always agree with the views of Britam.