To formally reclassify or rename someone or something in a significant way.

पुनः नाम देना

English Usage: After his conversion, he chose to be rebaptized with a new name.

Hindi Usage: अपने धर्मांतरण के बाद, उसने एक नए नाम के साथ पुनः नाम लेने का निर्णय लिया।