Miketz - Binyamin

A leftover thought:

Rashi on 43:30, quoting Sotah 36b, notes that Binyamin named all of his ten sons after ideas related to Yosef. Amongst the names are Bela, because Yosef was swallowed up amongst the nations, and Ard, because Yosef went down to amongst the nations. These names imply that Binyamin knew that Yosef was still alive. Rashi makes a similar comment on 37:35 regarding Yitzchak. Perhaps Binyamin (also?) had Ruach HaKodesh on this matter?