1)
What is the significance of the name 'Yericho'?
1.
Rashi (in Berachos 43a): Because of the beautiful fragrance of the balsam-trees that grew there.
2)
Having written ?be?Arvos Mo?av, why does the Torah need to add me?Eiver le?Yarden Yereicho??
1.
Rashbam? To confine the area in which they encamped in Eiver ha?Yarden facing the Yarden River to an area that was a. opposite Yereicho and not further south, and b. opposite Eretz Yisrael and not further north.