I don't have the references currently, but believe in the 30's the anointed were considered JWs, and the other ones that preached with them the companions, the Jonadab class.
Over time the term "Jehovah's Witnesses" seems to have evolved to include all baptized JWs as quoted in the newer articles above.
In our hall we often welcome "brothers, sisters, and friends". From the platform we usually we call someone "brother/sister" once they are baptized, and use the first name until then. That implies to me that baptized ones are Jehovah's Witnesses and publishers/associates are friend. However publishers and children of JWs also identify themselves as JWs.