Princess Vitani from The Lion King 2: Simba's Pride, has a few things going for her regarding being considered a Disney Princess. She is most likely the daughter of Scar, who not only is of royal blood, but was king for a while. The Lion Guard confirmed she was born during Scar's era, which would have made her a princess. Not only that, but she is Kovu's sister. Given that Kovu marries a Disney Princess, Kiara, that gives Vitani some nobility as well.