What do you call your cousin's daughter? The correct term for your cousin's daughter is technically your first cousin once removed. However, in many families, it is common to refer to your cousin's children as nieces or nephews. Therefore, it is acceptable to call your cousin's daughter your niece. In the same manner, she would refer to you as aunt or uncle, and your children would simply consider her their cousin, though they are actually second cousins.
It is worth noting that while "first cousin once removed" is the precise genealogical terminology, it is not commonly used in everyday language, particularly in English-speaking societies. Families typically create their own terms based on tradition or practicality.
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