Answering my own question: the American Society for Indexers has a list. https://www.asindexing.org/about-indexing/indexes-and-indexers-in-fiction/ https://www.

Answering my own question: the American Society for Indexers has a list. https://www.asindexing.org/about-indexing/indexes-and-indexers-in-fiction/ https://www.asindexing.org/about-indexing/indexes-and-indexe...