anepsios - It means "sister son" and is used in Col:
I think we'd agree that while one's sister's son is one's cousin, the words do not have the same meaning.
"Cousin" also includes sister's daughter, brother's son, brother's daughter, grandmother's sister's son, uncle's wife's sister's son, etc. We have one word for this: "cousin" and can say, "Charlie's cousins all came to the wedding." rather than Charlie's sister's sons and brother's sons and sister's daughters..."
I think it's likely this topic was discussed before on this thread somewhere. So to save space, a fairly complete argument from the RC side is here.
Thanks for your reply...
Correct link is here.