What do you call your grandparents?

I will call themas "Thaatha and Paatti".I give them lot of respect and obey their words.

I call them as amamma and thathayya. I respect them .

we call papa

In my local language there is term named "Valyumma" for grand mother and "Valyuppa" for grandfather.

Grandparents are always loveable and i call them dadu and dida.

i use to call papa to my grandparent.

I call ammamma and thathayya. nannamma and thathayya.

I call my grandparents as Dadaji and Dadiji and I really love them calling so. Though these words come from my mouth but for me it seems to come from my heart. I really love them calling so....