My mother (Lillian Seedall) use to make this for us growing up. I don't have her recipe but I believe this to be close.
2 cups dried Great Northern Beans
2 ham hocks
1 medium onion, roughly chopped
4 cups Water
1. Rinse beans. Place beans in crock pot, add water. Be sure water more than covers beans, add more water if needed. Add onions and ham hocks. Cover, cook on low for 6 -8 hours. When beans are tender, remove ham and remove bones, skin and fat. Shred remaining ham and add back to beans, stir and serve.