Jehovah does not have a last name
Indiana Jones and the Last Crusade
Jenova is the Hindi name for Jehovah.
Duc ' Giehova is the Vietnamese name for Jehovah.
Bwana is the African name for Jehovah in Swahili.
"Jehovah est son nom" is French for "Jehovah is his name." It refers to the belief in the divine name of God as Jehovah, particularly in the context of certain religious traditions that hold this name in high regard.
Adannu is the name for Jehovah in Babylonian it means... (The Lord.)
Jehovah's Witnesses
"Jehovah" is the name of God. No one invented him.
The name Jehovah Witness was adopted in 1931.
To the contrary, Jehovah's Witnesses freely use the name Jehovah. In fact they encourage the use of the name, so you would definitely not be excommunicated for simply using His name.
Jehovah's witnesses
It is claimed that the meaning of the name Yanez means gift of Jehovah. Etymologists believe it was originally a Christian name, but there is no evidence to back up their beliefs.