today is earth day so heres some indo european earth goddesses, starting with anglo-saxons.

Tacitus, in his Germania, wrote that the Angli (and a few others) "are distinguished by a common worship of Nerthus, that is, Mother Earth, and believes she intervenes in human affairs 1/

and rides through their peoples. There is a sacred grove on an island with a consecrated chariot that the priest alone may touch. He perceives the presence of the goddess in the innermost shrine and escorts her in her chariot. The countryside celebrates with days of rejoicing."

Demeter is the greek agricultural goddess whos name possibly comes from indo-euro "dʰéǵʰōm (earth) méh₂tēr (mother)."

she might have been referenced as early as 1400BC in Linear B writing about 𐀯𐀵𐀡𐀴𐀛𐀊 : Sito Potnia (wheat mistress) one of her epithets. now an orphic hymn

O universal mother, Demeter, famed august, the source of wealth and various named:
Great nurse, all bounteous, blessed and divine; who joy'st in peace, to nourish corn is yours:

Goddess of seed, of fruits abundant, fair harvest and threshing, are your constant care;
Who dwells in Eleusina's seats retired, lovely, delightful queen by all desired.

Phritvi is the rigvedic earth goddess whose name comes from an epithet meaning broad one (which shows up in some other IE cultures). she is naturally consorted with the sky god Dyaus and all but one of her hymns involve them as a pair. this hymn:

You, of a truth, O Prthivi, bear the tool that rends the hills.
You, rich in torrents, who with might quickens earth, O Mighty One.
To you, wanderer at will, ring out the lauds with beams of day;