The Valyrian steel swords made their way to Westeros independent of the Targs and Velaryons, out of trade from the Valyrian empire before the Doom. It was a huge status symbol in Westeros to afford one so if you were a House worth a damn, you'd commission oneDefinitely Not A Cop said:
Another question for those in the know: do all the Targaryen's/Velaryon's hold the Valyrian steel blades at this point, or have they been spread across the kingdom?
Like Jon Snow's sword, is it in the North yet with the Mormont's?