Is the use of the word Jehovah taking the Lord's name in vain?

Answer 1

Simply Put No. The name Jehovah is the accepted English translation of the name Yaweh which is the closest known pronuciation of the Divine name. And as we know in the lords prayer, Jesus first prays "our father in the heavens Hallowed be thy name", it would be impossible to do this without using it. The Name Jehovah is rejecyed by some who prefer to use Yaweh, Yaweh is an acceptable form of the divine name however Jehovah is the English tanslation, much like Jesus is the translation of Yeshua.

Answer 2

Quoting a extract from w08 7/1 24-25:

When it comes to some later events in the Biblical record, the ruins at Tel Arad offer some interesting support. For example, archaeologists have found a sequence of fortifications. Some of these may well date from the reign of King Solomon, who was known for his extensive city construction projects....It is of great interest that many of the about 200 ostraca recovered bear Hebrew names that are also found in The Bible...some of these secular documents are of even greater interest because they include God's personal name. Composed of four Hebrew letters יהוה (YHWH)-often called the Tetragrammaton-this proper name is unique to Almighty God. Later, superstition led many to believe that pronouncing or writing God's name is sacrilegious. However, the findings at Tel Arad, like many others, confirm that in Bible times God's name was freely used in daily life, in greetings, and in blessings. For instance, one inscription reads: "To my lord Elyashib. May Yahweh [Jehovah] concern himself with your well-being. . . . He is staying in the temple of Yahweh."