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.