The term "Watch Tower" originated with the Second Adventists and was a carry over by Charles Taze Russell to his own religious periodical and Society. Even the Proclaimers book admits as much. In the footnote we read: "The expression 'Watch Tower' is not unique to Russell's writings or to Jehovah's Witnesses. George Storrs published a book in the 1850's called The Watch Tower: Or, Man in Death; and the Hope for a Future Life. The name was also incorporated in the title of various religious periodicals. It stems from the idea of keeping on the watch for the outworking of God's purposes.--Isa. 21:8,11,12; Ezek. 3:17; Hb. 2:1."
Nor was there anything divine or original about the name Judge Rutherford gave to the International Bible Students in 1931. H.A. Ironside in 1911 in "Lectures on Daniel the Prophet" when referring to the Jews (he didn't have the International Bible Students in mind) whom the promises of Isa.43 would be fulfilled, noted on page 152:
"These shall be Jehovah's witnesses, testifying to the power and glory of the one true God, when apostate Christendom shall have been given up to the strong delusion to believe the lie of the Antichrist."