In Norse mythology, which wolf pursues the moon god Máni?

In Norse mythology, Hati Hróðvitnisson pursues the moon god Máni.

Hati is a wolf whose name is associated with hatred or enmity. He chases Máni through the heavens, just as the wolf Sköll pursues Sól, the sun. These paired pursuits provide a mythological explanation for the regular movement of the sun and moon.

At Ragnarok, Hati catches and swallows Máni. The event belongs to the larger collapse of the cosmic order, when the wolves overtake the heavenly bodies and the gods face their prophesied deaths.

Hati is not the same creature as Fenrir. Fenrir is Loki’s enormous wolf-child and Odin’s killer, while Hati is specifically connected with the moon. English sources may shorten Hati’s name, but Hati Hróðvitnisson is the fuller form commonly used in modern references.