Valar > Maiar
Fionwë was the son of Manwë
in the Lost Tales.
Nornorë was "merely" the herald of Manwë, though a Vala by
the definition of the term at the time. When Nornorë was dropped
and Fionwë "demoted" to Eonwë,
the latter took up Nornorë's former spot as the herald.