Intercaste marriage and child
I know intercaste marriage is forbidden. But my question is child from Brahmin father and non brahmin mother in general takes father's surname and lineage. Are they allowed for upanayan ceremony? (If/ if not can you provide sashtra about this topic) And we see many of them performing upanayan, what will be the effect of them if they indulge in priestly works ?
I heard many ancient barna sankar stories (eg Bidur , dronacharya, viswamitra eklavya (some says) also it was much common between Brahmin and khatriya in ancient days ( Sri Krishna's yadav lineage start from khatriya king and a Brahmin Rishi's daughter).