Besides Bleucorundum and Malaeragoth are there any other Sapphire Dragons we don’t know about in the Forgotten Realms?

I have a question, besides Bleucorundum and Malaeragoth are there any other sapphire dragons we don’t know about in faerun? Want to run a campaign based on actual faerun characters (aka more or less by the book, because most where I am prefer that style), so anything? Sure. There’s Tazaeraglaund, who lairs under the Gryphon Mountains, Moroardryn who dwells in caverns in the Uthangol Mountains, and Vharharaunt ‘Oldclaw’ who inhabits a ruined giant keep high in the Thesk Mountains.#Realmslore

— Ed Greenwood (@TheEdVerse) February 16, 2020