What’s in a name?
The title of this book in the Septuagint is Arithmoi, which translates into English as Numbers. This name was probably chosen because of the census described in the first chapter of the book, in which the tribes of Israel are numbered (1:1-3).
Note how the book begins, “And the Lord spake unto Moses in the wilderness of Sinai” (1:1, KJV). The and illustrates the continuity between Numbers and the previous book, Leviticus.