Who was Ido?
Rashi: He was the greatest in Kasifya.
Why does it say "va'Atzaveh Osam Al Ido"?
Malbim: When one commands about a third party, it says Al, e.g. va'Ytzav Alav Pharaoh Anashim."
What is Kasifya?
Rashi: It is a place in Bavel.
What is the meaning of "va'Asimah b'Fihem"?
Rashi: I put these words in their mouths, to say to Ido.
What does the verse teach about Achiv?
Rashi: It is a man's name. The Sheluchim will speak also to him. He and Ido are settled in Kasifya, to bring to us people to serve in the Mikdash.
Ibn Ezra #1: He was Ido's brother; they were Nesinim. It should say v'Achiv; the prefix Vov is omitted.
Ibn Ezra #2: It is the name of Ido's brother or relative.
Why does it say "Nesinim"?
Rashi: The Kesiv is Nesunim - they are situated in Bavel.
Malbim: They are Nesunim (appointed) over that place, via the king.
