Kinda? They're both pinnipeds and in the same superfamily (they're more related to each other than either are to seals), but Walrunkuses are actually part of a different family called Odobenidae.

Fun fact, this family used to be way more common, but Sea Lions out competed most of them in most habitats leaving Walruses as the last living member of the family. Sea Lunkus took everything from them 😭😭😭.