nīlāmbara cakravartī - Nīlāmbara Cakravartī; haya - becomes; tomāra - Your; nānā - maternal grandfather; se-sambandhe - by such a relationship; hao - become; tumi - You; āmāra - my; bhāginā - nephew (the son of my sister).

“Nīlāmbara Cakravartī is Your maternal grandfather, and by this relationship You are thus my nephew.