Freyr:
So what do you call those who are true to the Vanir? 
JMullaney et al., re Virgo:
Let’s not get carried away here. Almah meant in Hebrew an unmarried woman, including one betrothed – who might in fact be carrying a child, completely in accord with the mores but who had not yet become the woman of a household. The distinction in Jewish custom between the betrothal (not “engagement” but full handfasting) and the “marriage” – celebration of the beginning of a new family, a new household, by the already-betrothed couple, is not one easily rendered into our ideas. “Maiden” is probably the best translation.
And a “virgo” meant what 2sense says, unmarried woman – connoting the idea of virginity, the cultural standards being what they were, but not specifically meaning that. In support of this, I’ll offer the Catholic saint (whose name I don’t recall) who is honored as a “virgin martyr” even though she was raped in the course of ending up a martyr (barbarian invasions, IIRC). While she clearly did not die virgo intacta, it was equally obvious that, to say the least, it was not her idea.
And, while we don’t want to get off track, let me insert that the whole Immanuel story is a case of typology. There is nothing clearer in the world than that the story as told is for the easing of worry of the king of the time, and is directed at the immediate future. That the phrasing also pointed to a time when a virgin would have a child and he would be called “God with us” in a way not contemplated by the Judahite court at the time, is a secondary meaning understood by the Bible scholars down through the years to have been the work of the Holy Spirit.
If a life of a particular Anglo-Saxon saint were to have had a phrase, “Woe to him who pulleth away a Chad from the proper place, and woe to him who faileth to aid him who is old and whose eyes faileth,” nobody would have thought anything of it – until today, when it would be seen as evocative of the recent election.
A lot of the parallels in Jewish and “pagan” legend that are incorporated into Christianity are seen in exactly this light – foreshadowings of that which becomes illuminated in the Christian tradition. So what if Attis died and rose again, mystically identical to the grain that is harvested for the bread which represents Attis’ body, and grows again in the field? This fictional myth, say the Christian scholars, is God at work providing fertile ground in pagans’ minds for the truth of Christ who was in reality the Bread of Life broken for their and our sake.
Typology is fun. Ask Matthew Levi; he played it for all it was worth.