Things which are simply lucky or unlucky in a general way are almost innumerable but I have seen no mention of what is called the “even ash,” a twig which bears, exceptionally, an even number of leaves.
This is lucky to find by chance, and nearly as lucky if obtained by searching. It should be plucked and carried on the person, early in the day or at the beginning of an undertaking, and everything is then sure to go well.
The same belief is current with regard to the “two-topped” ash-twig in England and in Cornwall – which likewise has two leaves at the end instead of the usual single one.
(source: A Second Manx Scrapbook (1937) by W Walter Gill)