Names of Family members in English:

1. Grandmother

2. Grandfather

3. Grandparent

To be specific:

Paternal Grandfather
Paternal Grandmother
Maternal Grandmother
Maternal Grandfather

We generally use the word 'Grandparent' to refer to Grandfather or Grandmother.

4. Granddaughter

5. Grandson

6. Grandchild

7. Aunt
For example: She is my aunt (not: She is my aunty)

8. Uncle

9. Niece

10. Nephew

11. Cousin

Tip: We don't need to say 'Cousin Brother' or 'Cousin Sister' - just 'cousin' is enough. For example: She is my cousin (not: She is my cousin sister)

12. Sister - in - law

13. Brother - in - law

14. Mother - in - law

15. Father - in - law