अथास्य नाम करोति वेदोऽसीति त-दस्य तद्गुह्यमेव नाम भवति ॥ २६ ॥
In plain words
Then he gives the child a name, saying 'You are the Veda.' That becomes his secret name — the name no one else is told.
Close to the Sanskrit
Then he gives him a name, [saying] 'You are the Veda,' thus; that [name] of his becomes indeed his secret name.