Wiki and the blog. The Wiki article says that Veleda was worshipped as a goddess and lists her appearances in fiction, including Poul Anderson's "Star of the Sea" and David Drake's The Dragon Lord.
Veleda, my favorite Poul Anderson character, plays a prominent role in two timelines:
warlike in a prevented timeline;
warlike, then peaceful, in the Time Patrol timeline.
"Star of the Sea" is a short novel although it has never been published as a single volume. Written later, it is inserted into a central position in the series. Everard meets and has a relationship with Janne Floris, Veleda's "goddess," but cannot stay with Janne because we know that he will meet Wanda Tamberly later that same year, 1986.
The Time Patrol series, now complete in two long volumes, could be reorganized as a thematic tetralogy:
The Guardians Of Time;
The Gods Of Time;
The Thieves Of Time;
The Shield Of Time.
The Gods Of Time would be "The Sorrow of Odin the Goth" and "Star of the Sea." The latter completes a diptych about Northern European mythology and immediately precedes the introductions both of Wanda and of the Exaltationists.