Is “Jealous” a name of God?
Ex 34:14 says “for you shall worship no other god, for the LORD, whose name is Jealous, is a jealous God”.

Reply:

This subject came up in discussion about the difference between the Names and the Titles of God.
Hebrew for “Jealous” is Qanna.
This means Jealous – NOT in the sense of envious of what another has – or suspicious of the intentions of another,
But in the sense of protective, vigilant to defend what is right.
Qanna is only used about God, and always in the context of God’s reaction to idol-worship, instructing people not to worship substitutes for God.

EG. References:
Exodus 20:5 You shall not bow down to them or serve them, for I the LORD your God am a jealous God
Exodus 34:14 for you shall worship no other god, for the LORD, whose name is Jealous, is a jealous God
Deuteronomy 4:24 For the LORD your God is a consuming fire, a jealous God.
Deuteronomy 5:9 You shall not bow down to them or serve them; for I the LORD your God am a jealous God
Deuteronomy 6:15 for the LORD your God in your midst is a jealous God.

In all these, “Jealous” means: God cannot tolerate his people worshiping other gods.
The reference to “Jealous” being his NAME must mean that it is an intrinsic part of his nature.
Something without which he could not be God.
In this context, “Jealous” says that there is no-one else like him. That is a Biblical Universal Truth.
God cannot lie and suggest it is not so.

Put it another way:
God cannot be who he is and allow his people to worship substitutes for the real God.
He cannot tolerate it, or he will not be true to himself.
In other words, he would lie.
He would accept a conflict with his own person, downgrading himself.
This is not possible.

So:
Jealous is his NAME: means – it is who he is.
It is part of the identity of God.

Conclusion: We can use Jealous as his name, but biblically, only in the context of warning his people about worshipping other gods.

At this point, the Original Questioner came back with:
So, other things such as Love, Light, The God who Sees etc……are these not also intrinsic to God and therefore his names?

Reply:
Are we only justified in using names of God when he has specifically said they are his names?

His names do describe the characteristics which are intrinsic to him.
“Yahweh” – Eternal, Immutable, Self-existent (the meaning of the tetragrammaton)
(And now you have pointed it out) “Jealous” – Unable to tolerate a challenge to him being “Echad” (Deuteronomy 6:4 – a Unity.)

Your question asks: Can we do the reverse logic and say that all the characteristics (the theological term is Attributes) which are intrinsic to him must therefore be his names?
I don’t think I’d be happy with that.

YHWH is regularly announced as a name.
Exodus 3:14 God said to Moses, “I AM WHO I AM.
Isaiah 42:8 I am the LORD (Yahweh); that is my name..
None of his attributes are announced as names apart from that one instance you found in Exodus 34:14.

So, “God is love” describes his nature. Is it also announced as a Name?
I can’t find any instance.

Yahweh Jireh (and similar occurrences) is the Name followed by a descriptive title.
Like William the Conqueror.

William’s mother may have used the title ABOUT him, but not in the context of her relationship WITH him. She would just use his name.
William! Come for your dinner!