Sawyer, who starred on "Everybody Loves Raymond" alongside Madylin and their brother Sullivan, passed away on April 23. He was just 19.
"Sawyer was more than just a brother. He was a strong and selfless friend. When confiding in one another, Sawyer always had the kindest words of encouragement. He will live on in my head and those shared moments forever," Madylin, 23, said.
Her younger sister Maysa Sweeten also said her memories with Sawyer have been one the best she ever had.
Sullivan has yet to comment on Sawyer's death.
