Catechism of the Catholic Church

The name one receives is a name for eternity. In the kingdom, the mysterious and unique character of each person marked with God's name will shine forth in splendor. "To him who conquers... I will give a white stone, with a new name written on the stone which no one knows except him who receives it." "Then I looked, and Lo, on Mount Zion stood the Lamb, and with him a hundred and forty-four thousand who had his name and his Father's name written on their foreheads."