Place water, stock, ham bone, onion, celery and bay leaves in large saucepan or Dutch oven. Bring to boil on medium heat. Reduce heat to low; cover and simmer 1 hour. Remove ham bone. Skim off excess fat.
Stir in ham, beans, pasta, Italian seasoning and rosemary. Cook 5 to 10 minutes or until pasta is tender. Remove bay leaves before serving.