since when did Jehovah become a common name?

QuestForThruth

http://www.jehovahs-witness.net/watchtower/beliefs/178567/1/Does-the-name-Jehovah-actually-exist-in-the-original-Hebrew-language
The Almighty Homer

Answer : when Christendom most likely wanted to separate totally away from the faith of the Jews and focus more of their faith on Christ.
Just a guess
QuestForThruth

The Judaism religion have come from the "Talmud",I dare say that "god religion"(Yawist?Yaooist?) have been separate when the "Talmud and Jesus" have come in this world...
But the true faith was in the "some Jews" hand after the crucifixion "Christendom" have become another false Religion.
Even the son have come to do the will of is father,not to begin another religion...