Adelia Zeidler married Norman Zeidler almost four decades ago. The pair tied the knot in Augusta, Kentucky, on March 14, 1987. However, he passed away after 17 years together, in October 2004. Nick Clooney, his father-in-law, shared the news of Norman's passing on his website, revealing that his son-in-law, a retired Army Captain, passed away at the age of 47 due to a heart attack.At the time, Nick Clooney had to postpone a debate because of Norman Zeidler's sudden passing. Two decades later, Adelia "Ada" Zeidler, George Clooney's sister, has also passed away at the age of 65. She died after a long battle with cancer.Keep reading to learn more about George Clooney's sister, who led a private life compared to her younger brother.How was Adelia Zeidler described in her obituary?Adelia Zeidler passed away after a long battle with cancer. According to her obituary, she passed away peacefully at St. Elizabeth Healthcare and was surrounded by her family and the people that she loved.In her obituary, Adelia "Ada" Zeidler was described as:"A talented artist, she shared her skills as an elementary art teacher at Augusta Independent School for several years. In high school, her academic achievements qualified her to be a National Merit Scholar. Her love for reading connected her with other readers in a local book club. She was also a member of the Augusta Art Guild and was a past grand marshal of Augusta's Annual White Christmas Parade."She is survived by her two children, Nick Zeidler and Allison Zeidler Herolaga, Allison's husband, Kenny, her younger brother, George Clooney, and his wife, Amal.What did George Clooney say about his late sister, Adelia Zeidler?Adelia Zeidler is George Clooney's older sister, and despite the differences in their lifestyle, they remained close till the very end. George Clooney shared his sentiments about his late sister, Adelia, in an exclusive statement to PEOPLE. He said:"My sister, Ada, was my hero... She faced down cancer with courage and humor. I've never met anyone so brave. Amal and I will miss her terribly."George Clooney's older sister, Adelia, lived a quiet and meaningful life. She was an artist and a teacher by profession. At the age of 65, she passed away peacefully after a long battle with cancer. At the time of her death, she was surrounded by loved ones. George Clooney remembered her as brave, inspiring, and deeply loved.Also read: Who was Adelia Zeidler? George Clooney's sister dies at 65