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).
Happy birthday, Adam Sandler! It seems hard to believe, but the actor and comedian turns 50 on September 9, 2016. In honor of his milestone birthday, Parade shares five things you might not know about Adam Sandler.