The valknut is a symbol consisting of three interlocked triangles. It appears on a variety of objects from the archaeological record of the ancient Germanic peoples. The term valknut is a modern development; it is not known what term or terms were used to refer to the symbol historically.

The numbers three, nine, and other multiples of three are significant numbers in Germanic paganism. Both numbers appear throughout surviving attestations of ancient Germanic folklore, in both mythology and Germanic paganism. Along with the number 27, both numbers also figure into the lunar Germanic calendar.