The Celtic symbol of three conjoined spirals may have had triple significance similar to the imagery that lies behind the triskelion. The triple spiral motif is a Neolithic symbol in Western Europe. It is carved into the rock of a stone lozenge near the main entrance of the prehistoric Newgrange monument in County Meath, Ireland. A variant of the symbol is also found, carved into the wall in the inner chamber of the passage tomb. Because of its Celtic associations, it is also used as a symbol of Brittany (alongside the hermine).
In the north of Spain, the triskelion is used as a symbol of Galizan and Asturian nationalists. A similar symbol called lábaro by Cantabrian regionalist can be compared to the neighboring Basque culture's four-branched lauburu.
A possibly related symbol of Germanic origin is the valknut, and the Celtic and Germanic triquetra.