That's quite a striking difference. But even more telling is the fact that the phrase "one of Jehovah's Witnesses" occurs a whopping 2,850 times in the literature, versus a scant 94 cases of "a Jehovah's Witness". Very much a hive mentality at work.
I was taught...long..long time ago to use the expression "one of Jehovah's witnesses"
Note the fact that witnesses is not capitalized.It was explained to me that it was done that way to show we were not JUST another religion
EG: Catholics..Lutherans...Baptists etc WE were all witnesses for Jehovah.I don't know when it changed but Witnesses always has a capitol now.
As a side thought at a service meeting long ago and far away the guy in charge,don't remember what they called him...pre elder period.
He took about 15 minutes to go through the point we were "one of Jehovah's witnesses" We were not a Jehovah's Witness or a Jehovah Witness.He must have gotten chewed on by a CO by the way he was carrying on.It was a laugh looking back on it now.