Njord's exact relationship as well as that of the rest of the Vanir and how they are related to the Aesir has never really been exactly defined in Scandinavian mythology, but considering the Vanir allegedly predate the Aesir and counting Buri and Bor as respectively the Norse equivalents of Cronus and Zeus, my speculation is that Njord could be the brother of Bor, the father of Odin. Another possibility is that Njord is another name for either Ve (Lodur) or Vili (Hoenir), but that assumption would be based on the idea that Odin is the direct counterpart of Zeus. About the only thing that can be said with any certainty is that Buri, Odin's grandfather, is the ancestor of the Asgardians and among them is both Njord and Odin.

Njord ,as well as that of several of the Asgardian and Olympian gods in the MU, also has a bio on the Guide to the Mythological Universe Web-Site incorporating his non-canon appearances outside the Marvel Universe.

Aegir is also another sea-god in the cosmology of Asgard, but his direct Greek counterpart is the Titan Oceanus. Njord is closer to being Poseidon's/Neptune's counterpart. Ironically, sea-gods aren't that prevalent in other cultures. The Mesopotamians had Ea (Enki), the Chinese Yu Qiang, the Japanese Susanowo, the Celtic Llyr (possibly not to be confused with Leir), the Polynesian Tangaroa and African Olokun. Meanwhile, the Egyptians had a god called Khnemu in charge of the Nile, Varuna became a sea-god in Hindu myth after being deposed by Vishnu, the Mayan rain god Chaac, the Aztec culture had a water god called Tlaloc, the Incan rain-god called Coniraya, the Slavic tribes a rain-god called Potrimpas, the Finn-Ugrian tribes a water-god called Nahti, and then Chahuru, a river god known by several Native American names.