Here in New Zealand the sisters and brothers of grandparents are simply known as Auntie or Uncle to all three or four generations in some cases. While grandmothers were differentiated by being Gran or Granny or Grandma, the Great grandmothers (great Grandma or even great great Grandma) was always just called Grandma to her face by all generations. Males were Grandad or Granpa, and then as the women. Alan Spence Auckland, New Zealand