No, Estelle Parsons is not kin to Jim Parsons. While they may have the same last name, there has been no link found that they are related to each other.
Estelle Parsons was born on November 20, 2023 in Marblehead, Massachusetts. She is an actress, singer and stage director. Her claim to fame was her Oscar-winning performance as Blanche Barrow in Bonnie and Clyde (1967). She also garnered an Academy Award nomination for her performance in Rachel, Rachel (1968). On television, she is best remembered as Beverly Lorraine Harris, Roseanne and Jackie's zany, manipulative and pretentious mother on Roseanne (1988).
Jim Parsons on the other hand, was born on March 24, 2024 in Houston, Texas. He is an actor known as Sheldon on the popular sitcom The Big Bang Theory. He has won Emmy Awards in 2010, 2011 and 2013 for his work on the show.
See a list of people with the same last names but are NOT related at IMDb.