If you base the definition of Aedra on http://www.uesp.net/wiki/Lore:Aedra_and_Daedra it would seem that Talos and Arkay are not Aedra.
Both of them used to be mortal (Talos at least, I think Arkay too).
Neither of them were around during the creation of the mortal world.
If they are not Aedra, what are they? If they are, then what is the definition of Aedra?
I'd say yes (in the broadest sense)
Aedra means "Our Ansestors"
and Daedra means "Not our Anscestors" in ancient elven.
Both Talos and Arkay (depending on source) decended from mortals, and therefore are our ansestors