Etymology of narrative (adj): mid-15c., from Middle French narratif, from Late Latin narrativus "suited to narration," from Latin narrat-, stem of narrare

Etymology of narrative (n): "a tale, story," 1560s, from Middle French narrative and from narrative (adj.).

Etymology of Narration (n): early 15c., from Old French narracion "account, statement, a relating, recounting, narrating, narrative tale," and directly from Latin narrationem (nominative narratio) "a relating, narrative," noun of action from past participle stem of narrare "to tell, relate, recount, explain," literally "to make acquainted with," from gnarus "knowing," from PIE suffixed zero-grade gne-ro-, from root gno- "to know