The Manu of Manu Smriti is same as Manus of Manvantar or he is any rishi? Also, which Manu he is if he is Manu of Manvantar?
This Bhṛgu will fully describe to you this (Law); this sage has learnt the whole of this in its entirety, from me.—(59)
स्वायम्भुवस्यास्य मनोः षड्वंश्या मनवोऽपरे ।
सृष्टवन्तः प्रजाः स्वाः स्वा महात्मानो महौजसः ॥ ६१ ॥
There are Six other Manus, high-souled and mighty, who belong to the same race as this Svāyambhuva Manu, and have called into being, each his own offsprings.—(61)