Wendehorn is a pseudo-runic symbol resembling the Tvimadur symbol, akin to a historical bindrune, consisting of the equally pseudo-runic symbols of the Lebensrune ("life rune") ᛘ and Todesrune ᛦ ("death rune"), symbolizing 'life' and 'death' respectively. The term is due to Guido von List's Das Geheimnis der Runen, where it does not figure as a full member of the Armanen runes, but is mentioned in the context of the crescent moon being "the rune of Freya, who promotes childbirth."
It was taken up by List's Armanist followers, such as Rudolf John Gorsleben,Gorsleben, Rudolf John Hoch-Zeit der Menschheit and Siegfried Adolf KummerKummer, Siegfried Adolf Heilige Runenmacht and is still in use in Irminenschaft and Armanenschaft-inspired esotericism today (Karl Spiesberger,Spiesberger, Karl Runenmagie, Runenexerzitien fur Jedermann, Reveal the Power of the Pendulum Karl Hans Welz,The Site of Karl Hans Welz ; Armanen RunesKnights of Runes Adolf Schleipfer, Larry E. CampHandbook of Armanen Runes by Larry E. Camp Europa Ltd.).
Karl Maria Wiligut utilised this symbol,a.k.a. Widar, Jarl Whispering of Gotos - Rune-Knowledge [from Hagal 11 (1934), Heft 7, pp. 7-15] referring to it as 'Wend-horn', in his own runic row but did not develop his runic row until 1934 and the Wendehorn is mentioned in List 1908, Gorsleben 1930 and Kummer 1932. Its earliest reference in contemporary times is in the many works of Guido von List, of which many are published before 1908.
Karl Spießberger in his 1955 Runenmagie identified it as a combination of "male Man" and "female Yr", symbolizing a hierosgamos.
The Wendehorn appears in "runic massage".German language Runic massage website
See also Stephen E. Flowers Rudolf John Gorsleben Hagal (Armanen rune) Siegfried Adolf Kummer mother! Karl Spiesberger Jarl Widar
Notes
References Spießberger, Karl - Runenmagie, 1955 von List, Guido - Das Geheimnis der Runen, 1908 (GvLB no 1) John Gorsleben, Rudolf - Hoch-Zeit der Menschheit, 1930 Kummer, Siegfried Adolf - Heilige Runenmacht, 1932 Widar, Jarl - Whispering of Gotos - Rune-Knowledge [from Hagal 11 (1934), Heft 7, pp. 7–15] Flowers, Dr. Stephen E. and Moynihan, Michael - The Secret King (2001)