Causes: Any nurturing cause makes sense for Danu. Causes that aid mothers or women in general. Also, protecting the earth.

Daghda+

Spirit of the sky, rain and thunder. Spirit of plenty. A virile, jovial (pun intended) and friendly god. Easy to get along with. A people's deity. Has giant man-parts.

Causes: Feeding the hungry! Also, fertility-related causes. Curing prostate cancer or stopping STI's. Causes that help fathers or men in general. Populist causes.

Lugh+

Spirit of heroism and leaders. Appointed High King of the gods. A transfunctional and mercurial deity who draws on the domains of all other gods. Spirit of noble self-sacrifice.

Causes: Lost causes. Those who are alone or outnumbered. Supporting principled, honorable people in the face of great adversity. Supporting just war efforts. Destroying dictators. Freeing slaves. As an elected king, potentially pro-democracy causes. Organizations or causes that promote heroism and selflessness. County or state fairs, or any country fair. Competitions. Feeding the hungry.

Whenever someone willfully chooses to sacrifice themselves for a greater cause, they are honoring Lugh.

Common misconceptions: Lugh is often seen as a sun deity. There is no evidence for this. The sun is female in all Celtic cultures and Lugh is associated with light, but never the sun. He is not the Helios you're looking for.

Morríghan

Spirit of death and sexuality. Morríghan is a goddess in her own right, but she also appears as na Trí Morríghna, the Three Great Queens, given as separate goddesses below.

Causes: No charity work particularly represents Morríghan. You could imagine she'd support honoring the dead, but that's not her gig—she's Death itself, she is hungry and she seldom appears in a compassionate guise. Although any cause that sends people to die could be considered a toast to Morríghan, in a sense.

(Many people would attach feminist causes to her, but I'd leave that for Macha, below.)

Common misconceptions: Morríghan is often depicted as evil. But all the Irish gods are seen as embodying virtue. Morríghan and her aspects represent both a necessary natural force, as well as an ethical virtue: aggression against one's enemies.

Macha*

Spirit of Victory. More accurately, the spirit of bua—a concept that involves the synergy of ethical virtue, inner and outer strength, and victory. The spirit of sovereignty, which she can bestow or revoke. Notably, she gave her life in the battle against the giants ("Macha the daughter of Ernmas fell at the hands of Balor...") and the very next passage shows Lugh turning the tide of the battle.

Causes: Pregnant women! Causes promoting wine, mead or alcohol. Horse-related causes. Preserving the monuments of Ulster/Northern Ireland. Political causes. Wars. Feminist causes.

An Badhbh Catha, a.k.a. "the Badhbh"

The Battle Crow, spirit of bloodshed and frenzy. There is a specific trance that sometimes comes over a warrior as they kill, so that they act with almost unconscious fury and grace—that's her.