Does Rig-parisishta a real supplement to Rig Veda?
Origin of doubt: Rig-parisishta (the supplement to the Rig Veda):
radhaya madhavo devo madhavenaiva radhika/ vibhrajante janeshu.
Meaning: Among all persons, it is Sri Radha in whose company Lord Madhava is especially glorious, as She is especially glorious in His.
I doubt Radharani were any where mentioned in Rig Veda (Not that I am aware of!) or is it endorsement by ISKCON?