Here's the breakdown:
* Latin Root: The word comes from the Latin word "familia," meaning "household" or "family."
* Middle English: The word "familial" first appeared in Middle English, likely formed by adding the "-al" suffix to "familia," indicating "relating to" or "of the nature of."
* Evolution: Over time, the word "familial" became increasingly used to describe things related to family relationships.
Therefore, the word "familial" is a product of linguistic evolution, not a single invention.