Worms in apples, [122];
Day of the worms, [123];
that eat the cherries, [202];
charms against worms in beasts, [352], [353]

Wren, The, lends its tail to the wagtail, [228];
becomes king by a trick, [300];
a furtive bird, [301]

Y

Ygdrasil, The Northern, [345]

Z

Zanas, [21]

Zoroastrianism, [26]