godmother (n.)

also God; Old English god "supreme being, deity; the Christian God; image of a god; godlike person," from Proto-Germanic *guthan (source also of Old Saxon, Old Frisian, Dutch god, Old High German got, German Gott, Old Norse guð, Gothic guþ), which is of uncertain origin; perhaps from PIE *ghut- "that which is invoked" (source also of Old Church Slavonic zovo "to call," Sanskrit huta- "invoked," an epithet of Indra), from root *gheu(e)- "to call, invoke." The notion could be "divine entity summoned to a sacrifice."

But some trace it to PIE *ghu-to- "poured," from root *gheu- "to pour, pour a libation" (source of Greek khein "to pour," also in the phrase khute gaia "poured earth," referring to a burial mound; see found (v.2)). "Given the Greek facts, the Germanic form may have referred in the first instance to the spirit immanent in a burial mound" [Watkins]. See also Zeus. In either case, not related to good.

Popular etymology has long derived God from good; but a comparison of the forms ... shows this to be an error. Moreover, the notion of goodness is not conspicuous in the heathen conception of deity, and in good itself the ethical sense is comparatively late. [Century Dictionary, 1897]

Originally a neuter noun in Germanic, the gender shifted to masculine after the coming of Christianity. Old English god probably was closer in sense to Latin numen. A better word to translate deus might have been Proto-Germanic *ansuz, but this was used only of the highest deities in the Germanic religion, and not of foreign gods, and it was never used of the Christian God. It survives in English mainly in the personal names beginning in Os-.

I want my lawyer, my tailor, my servants, even my wife to believe in God, because it means that I shall be cheated and robbed and cuckolded less often. ... If God did not exist, it would be necessary to invent him. [Voltaire]

God bless you after someone sneezes is credited to St. Gregory the Great, but the pagan Romans (Absit omen) and Greeks had similar customs. God's gift to _____ is by 1931. God of the gaps means "God considered solely as an explanation for anything not otherwise explained by science;" the exact phrase is from 1949, but the words and the idea have been around since 1894. God-forbids was rhyming slang for kids ("children"). God squad "evangelical organization" is 1969 U.S. student slang. God's acre "burial ground" imitates or partially translates German Gottesacker, where the second element means "field;" the phrase dates to 1610s in English but was noted as a Germanism as late as Longfellow.

How poore, how narrow, how impious a measure of God, is this, that he must doe, as thou wouldest doe, if thou wert God. [John Donne, sermon preached in St. Paul's Jan. 30, 1624/5]

"female parent, a woman in relation to her child," Middle English moder, from Old English modor, from Proto-Germanic *mōdēr (source also of Old Saxon modar, Old Frisian moder, Old Norse moðir, Danish moder, Dutch moeder, Old High German muoter, German Mutter), from PIE *mater- "mother" (source also of Latin māter, Old Irish mathir, Lithuanian motė, Sanskrit matar-, Greek mētēr, Old Church Slavonic mati), "[b]ased ultimately on the baby-talk form *mā- (2); with the kinship term suffix *-ter-" [Watkins]. Spelling with -th- dates from early 16c., though that pronunciation is probably older (see father (n.)).

Sense of "that which has given birth to anything" is from late Old English; as a familiar term of address to an elderly woman, especially of the lower class, by c. 1200.

Mother Nature as a personification is attested from c. 1600; mother earth as an expression of the earth as the giver of life is from 1580s. Mother tongue "one's native language" is attested from late 14c. Mother country "a country in relation to its colonies" is from 1580s. Mother-love "such affection as is shown by a mother" is by 1854. Mother-wit "native wit, common sense" is from mid-15c.

Mother of all ________ (1991), is Gulf War slang, from Saddam Hussein's use in reference to the coming battle; it is an Arabic idiom (as well as an English one), for instance Ayesha, second wife of Muhammad, is known as Mother of Believers; the figure is attested in English in 19c. (Virginia is called mother of commonwealths from 1849). Mother Carey's chickens is late 18c. sailors' nickname for storm petrels, or for snowflakes.