למשפחותם לבית אבותם במספר שמות… (במדבר א:ב)

People refer to those they hate by their father’s name instead of calling them by their given name.  For example, we find that King Saul – when he addressed his son Jonathan about the absence of his young friend Dovid: “Why did the son of Yishai not come, neither yesterday nor today…”.  By calling Dovid “the son of Yishai,” King Saul demonstrated his dislike of Dovid.  Our King, our Father, likes us so much that He commanded Moshe Rabbeinu to count the Yidden by their names to demonstrate His love for every one of us: whenever He heard the name of another Yid, He derived Nachas from His beloved kinderlach.