“Fuwch Gyfeilioru’s themes are creativity, communication, arts, learning and knowledge. Her symbols are cows and milk. Fuwch Gyfeilioru is the Welsh Goddess of knowledge, inspiration, wisdom and happiness. Appearing sometimes as an elfin cow, She has an endless supply of magical milk that refreshes ailing dispositions with joy and creativity.
The Hay on Wye is a Welsh festival of words and language, specifically in the form of plays, music, debate, poetry and creative written and verbal forms that certainly honor Fuwch Gyfeilioru in spirit. In keeping with the theme, take out your magic diary today. Place one hand on the cover, asking this Goddess’s insight, then read it over. You’ll be pleasantly surprised by our awareness of metaphysical matters and your growth in the last few months. Drink a glass of milk, consume milk by-products or include beef as part of a meal to physically accept Fuwch Gyfeilioru’s powers into yourself. Focus intently on your goals as you eat or drink and don’t forget to thank the Goddess for Her gift by way of a mealtime prayer.
To motivate a litte extra creativity, make a milk shake (any flavor, but add a pinch of cinnamon for energy and nutmeg for luck). The blender “whips up” Fuwch Gyfeilioru’s energy in the shake as you incant,
“Creativity I claim, by my will and in the Goddess’s name!”
(Patricia Telesco, “365 Goddess: a daily guide to the magic and inspiration of the goddess”.)
So for today’s Goddess, the only information I could find on Her comes from Her Cyclopedia. It states that , Fuwch-Gyfeilioru is a pure white Cosmic Elfin Cow; She Who produces endless streams of milk; She Who has the power to heal, to make fools wise and everyone in the world happy.”  Apparently, She is similar to the Norse Goddess, Audhumla, the primeval cow or the first auroch who played a large part in Norse creation myths.
Her Cyclopedia, “Fuwch-Gyfeilioru“. (Which appears to be a dead link now 😦 )
Leviton, Richard. Encyclopedia of Earth Myths, “White Cow“.
Mallory, James. Encyclopedia of Indo-European Culture, “Cow” (p. 137).