Who knew the sea god loves to sing? On the Isle of Man, the Mananan Opera Festival takes its name from the island's patron god. (Source.)
Manannán became a rock star when the Manx band Skeeal named one of its songs after him.
Manny went on an adventure in the game King's Quest 3. There, he was an evil wizard and antagonist to the heroes.
The Island of Man pays homage to its first king with the House of Manannán, where you can travel into the past and get your Celt on. (Source.)