What does Rudolph call his wife?

The joke “What does Rudolph call his wife? Olive” plays on the names of characters from the famous Christmas song “Rudolph the Red-Nosed Reindeer” and another Christmas song, “Olive, the Other Reindeer.” The humor arises from the misunderstanding or reinterpretation of the lyrics of the latter song. “Olive, the Other Reindeer” is often humorously misheard as “Olive, the other reindeer,” implying the existence of a reindeer named Olive. In the context of the joke, it’s suggested that Rudolph, the protagonist of the first song, calls his wife “Olive,” playing on this misinterpretation and creating a playful connection between the two songs.