Analgous to the Valknut and the Trefos are the Triple Horns of Odin. Like the other two symbols it conveys the number three. Both the Valknut and the Triple Horns are closely associated with Odin and appear on Scandinavian picture stones. In particular the Triple Horns appear on the Danish Snoldelv stone. Whilst the Valknut is clearly associated with the Einheriar the Triple Horns are connected to Odin's ecstatic and magical powers and the mead of inspiration. Indeed one can extend this thinking further and argue that it represents the Wod, the magical ecstatic force and inspiration of the High Lord Himself.
Ron McVan writing in his Creed of Iron calls this symbol the Horn Triskelion and that it "is the sign of Thule or 'the Wotanically inspired one.' The three interlocking drinking horns show the three cauldrons in which the mead Wodstirrer is kept. Like the trefots, the horn triskelion represents the number 3,..."
All three symbols, the Valknut, Trefot and Triple Horns represent the Ario-Germanic concept of Arising-Becoming-Passing Away to New Arising. They also represent the Germanic concept of an upper world of the Gods, a middle world-Midgard and an underworld of the dead and other cthonic powers. In my opinion it also symbolises the tripartite Aryan caste system which is represented in the Elder Futhark, Younger Futhark and Armanen Futhork. The Triple Horns closely resemble the Head of Gereon, a much more obscure symbol. However Guido von List refers to it in his Das Geheimnis der Runen:
"The personal names "Gereon" and "Geretrut"[Gertrud] are rooted in the primal word "ge", meaning rebirth, and the hieroglyph of this, the "Head of Gereon", appears as an equilateral triangle made of three human profiles. But this Gereon is, in turn, the god incarnate in the All as the All-,World-, or Human-spirit. And for this reason the meaning of the "ge-rune" is closest to that of the "fyrfos". The difference between the two interpretations lies in the fact that the idea of the "ge" or "gibor"-rune seeks esoterically to approach the comprehension of the idea of the divine from below upward-in a certain sense from the level of humanity outward-while the explanation of the fyrfos seeks knowledge of God esoterically in the innermost level of man himself-and finds it. Thus it is known, as the spirit of humanity, to be unified with God from the standpoint of the "bifidic-biune dyad", and it will attain certain knowledge from inside out, as well as toward the inside from the outside. Here again the exoteric and the esoteric are clearly distinguished, and the fyrfos is recognised as an esoteric secret sign of high holiness which is represented exoterically by the "ge-rune". So, while the exoteric doctrine teaches that "man emerged from God and will return to God", the esoteric doctrine knows the "invisible cohesion of man and divinity as the `bifidic-biune dyad` "-and so it can be consciously said: "Man-be One with God!"(The Secret of the Runes, translated by Dr Stephen Edred Flowers)
So we have a link with the Armanen Gibor rune which resembles a mutilated Fyrfos. Gibor in turn is associated with the names Gereon and Gertud. According to Wilhelm Waegner in Asgard and the Gods the name Gertud is associated with the German Goddess Isa and also with Thrud, the daughter of Thor:
"Nehalennia, the protectress of ships and trade, was worshipped by the Keltic and Teutonic races in a sacred grove on the island of Walcheren; she had also altars and holy places dedicated to her at Nivelles. The worship of Isa or Eisen, who was identical with Nehalennia, was even older and more wide-spread throughout Germany. St. Gertrude took her place in Christian times, and her name[Geer, ie spear, and Trude, daughter of Thor] betrays its heathen origin."
The Triple Horn represents three draughts of magical mead from the cauldron of inspiration obtained by Odin from the mountain Hnitbjörg. It is thus a fitting symbol which should be embraced by all those who walk the path of the Lord of the Wod.