Someone's spirit has no name.
It is pure truth and inhabits a particular body for a period of time, and will, one day, leave it.
God won't bother asking "What's your name?" when the soul arrives for judgement.
God will only ask: "Did you love while you were alive?"
That is the essence of life. The ablity to love. Not the name we carry around on our passport or drivers licence or business card.
The great mystics changed their names or abandoned them altogether.
When John The Baptist was asked who he was he said:
"I am the voice of one crying in the wilderness."
When Jesus found the man on whom He would build His church, he ignored the fact that the man had spent his entire life answering to the name of Simon and called him Peter.
When Moses asked God for His name, God answered:
"I Am Who I Am."