From time to time I will post information about the Faerie Realm. I have several wonderful sources. Today’s is for the Alven.
Land of Origin: Netherlands
Other Origins: None known
Other Names: Ottermaaner
Appearance and Temperament: Alens have bodies that are so light is to make them almost invisible. They are not winged faeries, but they can travel through the air by becoming encased in a water bubble. Occasionally they will show themselves while wearing the skins of otters. The malice towards humans extends only to those who choose to desecrate their homes and sacred plants.
Time Most Active: At night.
Lore: Alvens are creatures of the moon under whose light they dance and play. They are water faeries who live in ponds, lakes, and rivers, but the River Elbe is sacred to them and in it they make their principal home. They cherish night blooming plants and will harm any human who attempt to pick or destroy them. Fish are their only known enemies, and they prefer to live in water enclosures where there are none.
Where to Find Them: In the River Elbe, an easy journey on the inner plane.
How to Contact: Look for them in faeryland and try approaching them as a friend, someone who also loves the moon and nature.
Magikal and Ritual Help: Undetermined, but they may be useful in protective and healing spells for the night blooming garden for the marine environment.
Source: A Witches Guide to Faery Folk by Edain McCoy