It's the same for many indian languages too. "Acchamma" stands for paternal grandmother in my mother tounge. "Acchan" stands for dad and "Amma" is mom so the co

It's the same for many indian languages too. "Acchamma" stands for paternal grandmother in my mother tounge. "Acchan" stands for dad and "Amma" is mom so the combination of those two is dad's mother. Similarly "ammamma" is maternal grandmother