The story
Presumably named for the Lelantos (now Lilas, Λίλας (Lílas)) River that runs through it, though ancient scholiasts derived it from the name of an otherwise unknown king Lelantos.
Etymology from Wiktionary, CC BY-SA 4.0.
Lelantine
Today it means: Designating the Lelantine Plain, a fertile plain on the Greek island of Euboea, between Chalcis and Eretria, and the Lelantine War said to have been fought over it. Full definition →