Grandmother generally refers to her father's sister, the youngest woman in her father's generation.

Aunt and your parents are of the same generation. Generally speaking, when there are many brothers and sisters in the family, for example, there are four aunts, elders, two aunts, three aunts and elders (that is, sisters-in-law, which will be called "old" at this time). In the north (especially in the northeast), my father's youngest sister is called "old aunt".

Generation:

1, the Han people's concept of attaching importance to clan continues to this day. Genealogy of generations, also known as Zhaomu, Zipai and Hangpai, is used to express the arrangement of named people in the same family, family lineage and blood order. The order of generations has existed since ancient times. Zhaomu is the patriarchal clan system in China, that is, the arrangement order of gods in ancestral halls or ancestral halls.

2. Zhao Mu system originated from the second generation clan marriage in matriarchal clan society. There are two generations of men and women in each clan, and only the opposite sex of two clans can marry. Children's lineages are determined by their mothers' lineages, and father and son belong to different clans. Later, Zhao Mu system gradually evolved. Ancestral temples or cemeteries were arranged in ancient times, with ancestors in the middle, and fathers and sons (ancestors and fathers) below to pay Zhao Mu, Zhao on the left and Mu on the right.

3. Take the Seven Temples of the Zhou Emperor as an example. Self-ancestor, father is Zhao, son is Mu. When arranged, the ancestors lived in the middle, Sanzhao was located on the left side of the ancestors, and Sanmu was located on the right side of the ancestors, so as to separate the order of elders and the distance between relatives and friends within the clan.

The above contents refer to Baidu Encyclopedia-Family Generation.