Journal of Research on Adolescence. Journal of Social and Personal Relationships. One's great-grandparent's parents would be "great-great-grandparents". In Flanders pepee or petje and memee or metje are most used. In North America, many families call one set of grandparents by their ethnic names e. In writing, Grandfather and Grandmother are most common, but very rare as a form of address. Child Development Perspectives. On the one hand, previous research suggests that children and adolescents who have a close relationship with their grandparents tend to have better well-being, experience fewer emotional problems, and demonstrate fewer problematic behaviours.