Likewise , the child father 's brothers are called Tata Lailai and Tata Levu according to seniority .
If she is older than the child 's own mother , then she is referred to as Nana levu or big mother .
The child father 's brothers are called Tata Lailai and Tata Levu according to seniority .
If she is older than the child 's own mother , then she is referred to as Nana levu or big mother .