Celtic (Irish) tradition. See the whole pantheon.
King of the Tuatha Dé until he loses an arm in the first battle of Moytura. A king had to be unblemished, so Bres took the kingship until Dian Cécht made a silver arm.
All sources for the Celtic (Irish) pantheon
Choose a deity to see where it comes from. Dashed lines are links the sources describe that are not parent and child.
Deities in other traditions who share a theme with Nuada: war and fighting. This is overlap in one area only.
Norse
wisdom, poetry, war
thunder, protection of gods and people, strength
love, desire, magic (seiðr)
law, oaths, war
Egyptian
storm, desert, chaos
kingship, sky
war, plague, healing
Mesopotamian
wind, command, the fates of cities
Compare across cultures