What I could figure of the HoN:
Chauntea, Eldath, Gwaeron, Lathander, Lurue, Meilikki, Nobanion, Shiallia, Silvanus, Ubtao, various animal lords, and many deities of nature creatures (like aarakocras, centaurs, etc.) are found in the House of Nature. In the House of Nature, Druid spells are Enlarged and Extended. Guardinals (such as Avoral, Cerdival, Equinal, Leonal, Lupinal, Musteval, and Ursinal) are native to here. There are MANY more than just the Five Companions listed in the BoED. Chauntea has the Great Mother's Guarden, Lathandar has Morninglory, Silvanus has the Deep Forest, Eldath has the True Grove, Meilikki has her Grove of the Unicorns, Shialla has the High Glade (adjacent to the Grove of Unicorns), Nobanion has the Pridelands with many of his Wemic petitioners, and Ubtao has the Labyrinth of Life, and in that, the Forbidden Plateau, with all sorts of dinosaurs.