Amos had a son named Rufus. Rufus had a son named Harry Archibold Eells. He played for the Cleveland Indians. Harry's grandson is the Eells who came in my office on a cold sales call (Thats how we met).
If you can prove your line, I believe you also qualify for Sons of the American Revolution under Capt Waterman Eells.
You also qualify for Mayflower through Sarah Tubbs.
You also qualify for sever others (Patriots and Founders, etc).