One reason is some believed the name was too sacred to pronounceNo, the JWs didn't make this up!
He (Not THEY) has a Name!The original Hebrew name of God re-discovered in 1,000 Bible manuscripts
On January 21, 2018, Bible Scholar Nehemia Gordon and his team of researchers discovered the 1,000th Hebrew Bible manuscript containing the original name of God in Hebrew with vowels.religionnews.com
Why do you think Churchianity REMOVED it????
However, Jesus said his God's name should be hallowed, held as sacred, sanctified (can't do that without using it )
Jesus used God's name - John 17:6 A - and Jesus will make it known - John 17:26