Mount Latium, after which the region got its name, was named after godess Lati/Lat. The transcript "DEA LATI, LVCIUS URSEI" found on many temples, meaning "to goddess Lat I dedicate this“, referred to her. She was considered a Mother Goddess.
The Celts also worshipped her, the phrase "DIE LATI" meaning "to Lat" would be found on manu Celtic-built structures on the British Isles dedicated to her.
But the most well known people honored her were the Arabs who gave her the name Al-Lat, simply the feminine form in Arabic for "Allah" considerring her God's/Allah's wife, and being the mother Goddess the Mother of Baal/Pal/Apollo/Veles.
From the etymology it appears that her name comes from Arabic, worshipped later by other peoples, like many other Arabian Gods and Goddesses e.g. Assyra/Aphrodite, and Baal/Apollo and Naila and Isaf.