Dweezil Zappa was born in Los Angeles, California, the son of musician Frank Zappa, and Adelaide Gail Sloatman, who worked in business. He is the second of four siblings: his older sister, Moon Unit, younger sister Diva and younger brother Ahmet. He is the cousin of actress Lala Sloatman. Zappa’s father was of Sicilian, Greek, Arab and French descent and his mother was of Danish, French, Irish and Portuguese ancestry.
Dweezil’s registered birth name was Ian Donald Calvin Euclid Zappa. The hospital at which he was born refused to register him under the name Dweezil, so Frank listed the names of several musician friends. “Dweezil” was a nickname coined by Frank for an oddly-curled pinky-toe of Gail’s. At five years old, Dweezil learned that his legal name was different, and he insisted on having his nickname become his legal name. Gail and Frank hired an attorney and soon the name Dweezil was official.
For six years, Zappa dated musician Lisa Loeb. Zappa and Loeb wrote and performed music together, and even went on tour with Loeb’s band. The couple co-hosted the cooking show Dweezil & Lisa on Food Network in 2004. The couple broke up in the summer of 2004.
In March 2010 Dweezil’s wife Lauren Knudsen filed for divorce in L.A. County Superior Court. According to the documents, she cited irreconcilable differences and applied to share joint legal custody of their two daughters.