Canonical Name: figure-of-eight loop.
Variant Name(s): Flemish loop, figure eight on a bight.

Category: loop on the bight.
Origin: Ancient.
Related knots:
Releasing: Can jam badly in any rope type.
Efficiency: Unknown.
Caveat: None, secure.
Uses: Boating, Climbing, Camping, Caving. Securing objects.
Comments:
Structure:
Tying: article/pictures
http://www.geocities.com/roo_two/figure8loop.html