Necile
Necile is a wood nymph who becomes the adoptive mother of Santa Claus in the 1902 novel The [Life and Adventures of Santa Claus].
She recurs in the The Life and Adventures of [Santa Claus (1985 film)|1985 film] by Rankin/Bass then the 1996 anime series then the The Life & Adventures of Santa [Claus (2000 film)|2000 film] by Mike Young Productions inspired by the novel.
She has also been portrayed in musicals adapting the story.