Λαουΐνιον
Could not find Λαουινίου in Logeion dictionaries.
Λαουινίου Proper-name noun: neuter genitive singular of Λαουίνιον
Λαουΐνιον -ου, τό Lavinium, city of Latium Ael. N.A. 11.16 etc.
Λαουΐνιον, ου (τὸ) = lat. Lavinium, v. du Latium, Plut. Cor. 29, etc.