Where does “Reden” come from?

Reden (German) comes from Middle High German reden, from Old High German redōn, from Old High German reda, from Proto-Germanic raþjǭ, from Proto-Indo-European h₂reh₁-, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

Reden (German): gerund of reden; plural of Rede