The peoples who inhabited the European continent before the racial influence of Africa through Persia entered the Greek and Roman cultures were what anthropologists of our day call the Indo-European peoples. The Picts, Celtic and Norse peoples are the result of three different westward migrations of these ancient peoples. But these are not the only ones and a linguistic view of the names of their Mother-goddesses are very telling.
The source of these peoples was said to be a very isolated and protected area of present-day Romania, ringed by the Transylvanian Alps. As their populations overran the area, they began gradual migrations both East and West. The eastward migrations were fairly limited due to the northward push of the Afro/Egyptian civilization and the southwestern movements from the Orient. Their influence eastward was felt in the Ukraine amongst the Slavs, and formed the basis for the Hindu civilization of present-day India. The westward migrations came in three waves, primarily. The first were the "Beaker People", whose furthest west migration were the ancestors of the Picts of Britain. These same people populated Greece and Rome first, and were the original basis for the cultures there, as they were throughout Europe.
So if these people were homogeneously covering Europe, why is the Hellenic culture apparently different, and visually a racial variant? This can be attributed to a melding with the northward-moving Afro-Egyptian peoples, particularly as a result of Alexander the Great's military conquests in Persia. The vast majority of these men brought home Persian wives, necessarily altering their home culture and even their very racial appearance. From Greece it spread to Rome.
Meanwhile, back in Transylvania, the next wave of people going north and westward were on the move. These were Iron Age men, the Men of Mil, the Celts. This was to become the dominant culture in Gaul and the British Isles. The last migration was primarily northern and formed the basis for the Norse peoples.
So now, how do their goddesses compare? The Eastward migrations find the goddess Tara in India. Tara has many aspects, covering all aspects of human life - not just the moon, as some cultures limit the Sky Goddess. There is a Sun Tara, a Moon Tara, Gold Tara, Red Tara, etc. - twenty-seven Taras in all. Three times nine goddesses whose sacred numbers are three and nine, and who are said to be the Creation of All Things.
The closest localities in the westward migration were Greece and Rome and here we also find related goddesses. Tana is the original Moon/Mother Goddess, goddess of Inspiration and Higher Love of the Etruscan peoples of early Rome. Tana was seen as youthful and beautiful in the youth of the Etruscan civilization, but as it aged, so did Tana, eventually becoming "Our Mother" and being replaced by a young and beautiful Diana at the height of the Roman culture.
Di-ana (two-mother) was a contradiction in that culture, being both virgin and mother - mother who is untouchable, unconquered, unmarried. Where that could come from can be enlightened by Tana herself. Tana's lover and belovéd mate was "cursed" so that he only slept and dreamed. Her only time with him was in his dreams. She became untouched by the Manifest Universe. Her only mate was on the astral plane, a god of ether and space.
As these people moved westward, the goddess grew older, grandmotherly. Amongst the Picts, she was Domnu, an old, wise, Goddess of Inspiration. The Welsh variant of this was the solar Dôn, mother of Arienhrod (a very Dianish figure). The second migration of the Celts called her Danu. Her name variants here are D'Ana, Ana, Anna, Anu. The similarity in descriptions between Danu and Tana/Diana is remarkable, still being a goddess of inspiration, higher love and wisdom - the only difference being in the natural aging process that even a goddess would have. She is still sexually unreachable, but has mellowed with age. She is a "Goddess of the People", motherly and now an object of love and respect as one would give their beloved mother/grandmother.
In a similar manner to the Hindu Tara, she forms the basis of a great pantheon of goddess aspects, her name often used as a root cell as the 9-fold Mother of All Things - Belisana, Morgana, Viviana, etc., just as the 27 Taras defined the Goddess of the Hindus. Her mate is Nwyre, the God of Ether and Space of the Celts, just as the Etruscan Tara - and there are other similarities, as well. Tana became the ancestral mother, to be replaced by her "daughter" Diana. In the same way, the Celts had Tiana and Tyana/Di Ana whose names mean respectively, "Ana of the Household" (ancestral mother) and "Thy Mother".
The correlations here are obvious. Even the minor consonant variations are of minor importance. The linguistic base of the Indo-Europeans shows a strong connection between the D and T consonants. An illustration of this point is the fact the DD is pronounced as "th" in the Welsh and Gaelic languages.
So can we find the source of our beloved Danu still present in its ancestral birthplace - the Alps of Transylvania? Unfortunately, no. In the early Roman empire, the expansion into those Alps was stopped dead by contact with the descendants of these great peoples - the Dacians. The Dacians are recorded as having a greatly developed society, rich in artistic and personal development. This was admired by both the Greeks and Romans. They were fierce warriors as well, considered unconquerable in those high mountain passes even by the Roman Legions. So a treaty was struck. The Dacians were shrew, however, and used this contact to improve their own military technology, and for a while, all was well.
Unfortunately, the Romans caught on very quickly, decided that the Dacians needed to be crushed at all cost and set their military machine to work to that goal.
Once accomplished, they proceeded to obliterate any reference to Dacia and replace not only the culture, but also the inhabitants as well. A great colonization move was encouraged by Rome, sending thousands of Italian, Greek and Gaulish settlers to this new, now largely empty land. The native Dacian language was completely Latinized, and these new settlers were so proud of their Roman heritage that they called themselves Romans, and are to this day called Romanians.
So it must be left to the Romans the dubious distinction of being the destroyers of the cradle of their very own civilization and ours - the Dacians of Transylvania.