>>2132325>>2132421It's no surprise they turned to Christianity given the lack of exclusivity in the tenants of Norse Paganism, and the similar values they held. It was one of the early popes who wrote about how the most devout pagans were the ones who converted most easily because the core values of norse paganism were comparable to christianity, doing worthy deeds and facing challenge to end up in a 'heaven' setting, family, sacrifice, and all that.
As for records of the mythology, most of it doesn't come from christian writing. It's primarily skaldic poetry, prose, and sagas. And part of their appeal is the simple living so that checks out with being 'primitive'.
As for OP Othal/Odal rune stands as a marking of home, it usually means heritage or belonging.