It's important to note that this is the most common term. However, other terms are also used depending on the region and family traditions. These include:
* Achan (അച്ഛൻ): This is a more general term for father, but it can also be used for grandfather in some families.
* **Periyappa" (പെരിയപ്പ): This means "big father" and is a more formal way of addressing a grandfather.
* **Thatha" (താത്ത): This is a more informal term used in some families.
It's always best to ask the person you are speaking to what they prefer to be called.