No it's official writings in stone that revealed the proof of King David and the house of David.
Atheist long used King David as proof that the Bible was not historically accurate. Then they find the proof that King David did in fact exist exactly as the Bible described. And atheist try and trash that proof. Here's to trying to have it both ways.
The Merneptah Stele (with a E not an A) does appear to refer to Israel though who or where is subject to some debate. It's in the Cairo Museum. I saw it when I was there. Impressive.
Haven't seen your reference for the House of David. Care to share?