The story
From Lomekwi + -an, after the archaeological site Lomekwi 3 in the Great Rift Valley, Kenya. From no earlier than 2015, the year of publication of the discovery.
Etymology from Wiktionary, CC BY-SA 4.0.
Lomekwian
Today it means: Of or pertaining to the period when certain stone artefacts, found at the archaeological site Lomekwi 3 in Kenya, were manufactured and used, apparently by hominins prior to the emergence of genus Homo. Full definition →