Maynard James Keenan is an American singer, songwriter, philanthropist, record producer, and winemaker. He is best known as the singer and primary lyricist of the rock bands Tool, A Perfect Circle, and Puscifer.

Caduceus Cellars is a winery in Jerome, Arizona, United States. It is owned by Maynard James Keenan, who is best known as the vocalist for Grammy Award-winning progressive metal band Tool. He is descended from Northern Italian winemakers. While the winery is named after the caduceus, an ancient symbol for commerce and staff of the Greek god Hermes, the vineyard is named Merkin Vineyards, after a pubic wig (merkin).