The Fomorians from Irish mythology are steeped in mystery. It is unknown where they came from, or the length of time they had knowledge of Ireland, and what actually happened to them. Lady Gregory describes one Fomorian habitat as a glass tower in the sea. Many people describe them as sea fairies or sea monsters. My best guess is that they were Nephilim!
David Bowie, Ashes to Ashes (1980). Pierrot is a stock character of pantomime and Commedia dell'Arte whose origins are in the late 17th-century Italian troupe of players performing in Paris and known as the Comédie-Italienne; the name is a hypocorism of Pierre (Peter), via the suffix -ot.