Triskeles

1889 "The three legs diverging from one centre, which is now the well-known arms of the Isle of Man, is the ancient Triquetrum, or, as Olshausen [Zeitsch. f. Ethnol., 1886, p. 283] more properly terms it, the Triskeles, seen on the oldest Sicilian coins and on those of Lycia, in Asia Minor" (Daniel Garrison Brinton, Proceedings of the American Philosophical Society, Volume 26, p. 177)