The only sword from the original game (excluding Sephiroth's "rematerialized" Masamune) was the Buster Sword, which was obviously never actually used. All six of Cloud's swords, and any composite forms which resulted, were entirely new weapons. Whether or not Cloud can be assumed to have even obtained the original swords (given that the "flashback" at the beginning shows Cloud rushing toward Sephiroth with the Buster Sword) is a topic for debate, I guess.