To my deep regret, I can't access your Cinderella article without signing up for a subscription I don't want and wouldn't use. Oh well. If I understand you correctly, it seems that the -ella suffix was more a female marker than an independent name. Which got me thinking: apart from Hansel and Gretel, fairytale characters tend not to have names, just identifying markers. Little Red Riding Hood; Goldilocks; Little Bo-Peep ... or their names had a meaning that is mostly forgotten, like Lucy Locket and Kitty Fisher. Very interesting: thank you!