* "Dada" (दादा) - This is the most common and widely used term.
* "Nana" (नाना) - This is another common term, particularly used in some regions.
* "Dadaji" (दादाजी) - This is a more respectful and formal term.
* "Nanaji" (नानाजी) - This is also a more respectful and formal term, similar to "Dadaji."
The choice of term may vary depending on the region, family traditions, and personal preference.