What was the sword that Arthur pulled from the stone called since Excalibur was gifted to him by the lady of the lake later?

It is true that the SWord given to Arthur by the Lady of the Lake was called Excalibur. But the SWord he pulled from the stone was also called Excalibur. A fact which would be considered extremely confusing but for the fact that they are mere stories written by two different people. The SWord and the Stone start to Arthur and Excaliber was written by Robert de Boron, and the Lady of the Lake version was written by Geoffrey od Monmouth.