अथास्य नाम करोति वेदोऽसीति ।तदस्यैतद्गुह्यमेव नाम भवति ॥बृह. ६,४.२६ ॥
In plain words
Then he gives him his name: "Thou art Veda." And that is his secret name.
The commentators
Bṛhadāraṇyakopaniṣadbhāṣyam· bhāṣya
अथास्य नामधेयं करोति 'वेदोऽसि' इति । तदस्य त- दुह्यं नाम भवति- वेद इति ॥
In plain words
Then he names the child, saying 'You are the Veda.' That very word becomes his secret name — 'Veda.'
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 — namely, 'Veda,' thus.