めいmei
1.

A female child of one's brother or sister, representing the familial relationship within a family hierarchy.

2.

The daughter of one’s sibling, highlighting the connection of kinship between generations.

Example:

そのは彼女の叔母さんのように見えます。

めいご姪御meigo
1.

A respectful term used to refer to someone else's niece, often addressed with an honorific suffix.

2.

A way to respectfully mention the daughter of a sibling or sibling-in-law of another person.

3.

A formal expression used to acknowledge a niece of someone other than oneself, highlighting the social relationship.

めいmeiko
1.

A female child of one's sibling or sibling-in-law.

2.

A person who is related to someone as their sister's or brother's daughter.

3.

The female descendant of a family member who is younger than oneself.