While all three personalities bear the same last name and are all actors/actresses, there has been no link found that they are related to each other. All three were part of the 1999 movie "Big Daddy", that starred Adam Sandler.
Jared Sandler is an actor and producer, known for Big Daddy (1999), The Benchwarmers (2006) and Grown Ups 2 (2013).
Jillian Sandler is an actress, credited for Big Daddy (1999) and Eight Crazy Nights (2002).
In celebrity buzz, Adam Sandler and Drew Barrymore still have great chemistry. The movie stars behind 'The Wedding Singer,' '50 First Dates' and now 'Blended' sang a duet about starring in romantic comedies together during their recent appearance on Jimmy Fallon's show. Catch more at New York Daily News.