To understand who someone's relatives are, you need more context. For example:
* "Who are John's relatives?" This could refer to his parents, siblings, children, aunts, uncles, cousins, etc.
* "Who are the relatives of the Queen?" This would refer to her family members, including her children, grandchildren, siblings, nieces, nephews, etc.
Let me know if you have a specific person or situation in mind, and I can help you identify their relatives!