Named for the nearby Cuyam arroyo cited in 1824, and for the (1843, 1846) Cuyama Ranchos. Either from a Chumash Indian word “kuyam” which means “clams”, or from nearby rancherias shown as “Cullama” and “Cuyama” on disiños of the land grants.
“Cuyama Mountains” were mentioned by Parke (1854).