This structure is closely related
to the Celts, the people who populated Western Europe about 3,000
years ago, and then successively later was forced west to Galicia,
Brittany, Wales, Scotland, and Ireland by Gauls and Germanic
Today, the variation is used as a logotype or symbol for l'alliance des pays celtes, a separatist movement in the Celtic region of France, Brittany.
The sign is associated with migrations and independent movements.
Compare with above in this group.