Mrs. Claus

Mrs. Claus is the wife of Santa Claus.

History
When Homer was dressed as Santa at the Springfield Mall, a girl asked if he felt okay. Homer told her that he will when Mrs. Claus' sisters got out of town.

Non-canon
A Young Grandpa Simpson paints Mrs. Claus on the side of Santa's sleigh in a pinup style with the caption "Naughty or Nice".