Lieve his olde by his ide

• Lay His Sword by His Side: (song) one of Thomas Moore's melodies, sung to the tune of If the Sea Were Ink

• leave

• lief: gladly, happily; dear, beloved

• [leave / lief] Isolde by his side

• leave it all [i.e. the milk] by his side: Kevin is like a cat that can be trusted with the cream