Max Awesome is the father of Les. His full name is mentioned in Scary Go Round.
Although the name of Les' mother is not revealed, if they were married it may have been Mrs. Awesome.
He married Angelina Kerplopolis, which made him the step-father of Thera. He's an uncle of Tyler Although she is sometimes referred to with a hyphenated surname (Kerplopolis-Awesome) in casual circumstances, her legal name does not appear to have been officially changed since the vice-principal only calls her Kerplopolis. He is the best friend of Muck, the uncle of Tyler Awesome the future father-in-law of Holley Holtey, the future stepfather-in-law of Noam Plinsky & the future step uncle-in-law of Derek Plinsky.