What group is closely associated with the Names?

"The recent history of the Sacred Name Movement is closely related to the history of the Church of God (Seventh Day). It appears that many who have joined the Sacred Name Movement originally were members of one or more of the Sabbath-keeping Churches of God (‘Origin and History of the Sacred Name Movement’ by Richard, Nickels, founder of the Giving & Sharing organization)." The Sacred Names were one of many subjects that caused disputes in the Church of God, Seventh Day, from the 1920’s through the 1940s.

Future articles will address their conflicts over other subjects, such as the apostolic reorganization, keeping feast days, Anglo-Israelism, the location of their headquarters in Israel, their name change, etc.

Who promoted the use of Yahshua?

There is a minor disagreement over who initially used the name Yahshua, but John Briggs, Paul Penn, a Jewish believer, and William Bishop, were believed to be the first. Briggs and Penn met Traina at his New Jersey assembly in 1936. We will discuss later how a student of Traina’s introduced him, Briggs, and Penn to the Sacred Name concept. Briggs in turn introduced it to William Bishop.

What group was instrumental in spreading the Sacred Names?

"July 11, 1939, The Assembly of YHVH was CHARTERED in the State of Michigan and the following names were listed on the Charter: (see names of charter members on p. 23) ... And this Organization and Charter permitted those who so desired to use such transliterations as Yahovah, Yahveh, Yah and Yahavah, by different local assemblies connected with this-what was supposed to have been a GENERAL ORGANIZATION. This is the record of what I found to be the oldest chartered Name group in the USA, though Elder Wm. Bishop tells me that THE ASSEMBLY OF YAHVEH BETH ISRAEL is older (http://qumran.com/sacrednames/snhist.htm)."

http://www.plim.org/Sacred%20Names%20Article.html