The Watchtower teaches Jehovah's Witnesses that Jehovah is God's real name, but there is no evidence to support this conclusion.
Bible scholars agree that JEHOVAH is a vocolization of God's name invented hundreds of years after the Bible was written. [1c]  (The name was created by combining the latin letters JHVH with the vowels of Adonai.) Even though Bible writers had no knowledge of the name Jehovah, it appears extensively throughout the New World Translation Bible of Jehovah's Witnesses. 2 John 1:9; 1 John 5:12;
One of the key doctrines of the Jehovah's Witnesses is that everyone must call upon the name of 'Jehovah' in order to be saved.  However the Bible says God's name is 'I AM'.
'Moses said to God, "Suppose I go to the Israelites and say to them, 'The God of your fathers has sent me to you,' and they ask me, 'What is his name?' Then what shall I tell them?" God said to Moses, "I AM WHO I AM. This is what you are to say to the Israelites: 'I AM has sent me to you.'" Exodus 3:13,14 
This name for God, 'I AM' resonates with the meaning of another name for God, YHWH or Yahweh.
The name Jehovah is a less common vocalization of the Tetragrammaton,- from Greek τετραγράμματον, meaning "four letters" יהוה (YHWH), ... 
While YHWH is the most common transliteration of the tetragrammaton in English academic studies, the alternatives YHVH, JHVH and JHWH are also used. 
יְהֹוָה appears 6,518 times in the Masoretic Text. The Masoretic Text was copied, edited and distributed by a group of Jews known as the Masoretes between the 7th and 10th centuries CE. The earliest available Latin text to use a vocalization similar to Jehovah dates from the 13th century and possibly earlier. ... Research the historical usage, origins, and history of the name Jehovah
Jehovah's Witnesses say that Jehovah is the correct and original pronounciation of God's name. However according to the historical records they are wrong. What if God prefers to be called, 'I AM' or YHWH some other name instead of Jehovah? Exodus 3:13,14
Here's what historians and Bible scholars say about the origins of God's name.
The God of Israel YHWH (Hebrew: יְהֹוָה) is referred to in the Hebrew Bible. The name YHWH is a combination of ... learn more about the Correct Name For God
A much deeper question than 'What is God's name?', is, 'Who is God?' or 'Who is our creator?'
i.e. what is the true nature of God? What is God like? Is he kind, loving, generous, ... does he have a great sense of humor? How can we know God? If we can understand God's personality, - his likes and dislikes, we would know how to have a close personal relationship with him.
Let's take a look at the God Jehovah (more accurately, YHWH). What does the Bible say? ... Learn more about Jehovah's Attributes
Jehovah is the first stage in our understanding of God. Primitive ancient people didn't fully understand God's compassion like Christians do today. Why is that?
Ancient people depended on the sun, rain, weather, plants, and animals for survival. They believed that the reason for natural disasters, drought, contagious diseases, locusts, etc., was because they did something wrong and God was punishing them. The ancient Israelites feared Jehovah because they lacked the understanding Jesus had about the compassion of God 'the Father'.
To avoid punishment, ancient people looked for ways to make Jehovah happy through sacrifice. Leviticus 23:19,20; 1 Samuel 16:5-7. ... Learn more about Jehovah and Why God is Feared
When Jesus walked this earth, the Pharisees were strong supporters of the Hebrew God YHWH. (The name Jehovah hadn't been invented yet however on this website we use the name Jehovah because it's the name JW's use. ) The Pharisees were preoccupied with God's rules, laws, and an outward show of righteousness, but they did not understand the love God has for each one of us. Learn more about the Strict Rules of Jehovah
Jesus is not like Jehovah at all. In fact, if you carefully read the words of Jesus, you will notice that 'God the Father' thinks very differently than the God Jehovah. What is the difference? ... Learn more about Jehovah Vs Jesus
Followers of the ancient God Jehovah are not free to be themselves or to engage in independent thinking. They cannot rebel against the laws of their tribe.
The survival of their tribal organization is far more important than individual rights and freedoms.
Since the purity of the tribe must be maintained to avoid the wrath of Jehovah, followers must adhere to a strict code of conduct in order to experience God's love and blessings. ... Learn more about the difference between the Watchtower and Christianity
1a. 'It is important not only to know but also to use that name. Why? Because the Bible tells us: “Everyone who calls on the name of Jehovah will be saved.”—Romans 10:13; Joel 2:32. WT, Feb 1, 2009, Article: Does God Have a Name?.
1b. Notice the incorrect information in the above Watchtower quote about the use of the name Jehovah in the Bible. The name Jehovah does appear in some Bible translations today but it hadn't been invented when the original books of the Bible were written. Most scholars believe the name "Jehovah" to be a late hybrid form derived by combining the Latin letters JHVH with the vowels of Adonai. 
1c. catholic.com says, 'About the 13th century the term "Jehovah" appeared when Christian scholars took the consonants of "Yahweh" and pronounced it with the vowels of "Adonai." This resulted in the sound "Yahowah," which has a Latinized spelling of "Jehovah." The first recorded use of this spelling was made by a Spanish Dominican monk, Raymundus Martini, in 1270. ... Interestingly, this fact is admitted in much Jehovah's Witness literature, such as their Aid to Bible Understanding (p. 885). This is surprising because Jehovah's Witnesses loathe the Catholic Church and have done everything in their power to strip their church of traces of Catholicism. Despite this, their group's very name contains a Catholic "invention," the name "Jehovah." '
2. Meaning of Exodus 3:13,14, 'I Am that I Am'. Wikipedia
3. Origins of the name 'Jehovah'. Wikipedia
4. The name of God in Judaism used most often in the Hebrew Bible is the four-letter name יהוה (YHWH), also known as the Tetragrammaton. El, Elohim, El Shaddai, Adonai, Elyon, and Avinu are regarded by some Jews not as names, but as titles highlighting different aspects of YHWH and the various 'roles' of God. See Names and Titles of God in Judaism (Wikipedia) for a more in depth explanation of the following names and titles of God.