As I wrote in my previous post, Queen Swanwhite is something of an oddity, in Narnian terms. The reader hears about her only through the comments of another character, unlike, say, Ram the Great and King Erlian, two other characters the reader never meets but receive a mention from Lewis-the-narrator with the authorial weight that implies. Plus, she’s a Queen of supernatural beauty with the magic power to retain her reflection in woodland pools, while other monarchs have no magic. Then, there’s the oddness of her name. She’s named for an animal, actually a description of an animal with folkloric, tragic origins.
Did she leave any descendants? Perhaps she did, and they may have named in the same manner she was: Fairy Tale style.
Narnian Names After Queen Swanwhite