Thanks to many of you for the ideas, and I see at this point it's not all that clear cut as to what it truly represents. I hope some of you were kidding with the ancient demon amulet stuff, as the person who was given this is of the belief it was from a very religious person of good faith, not some mystical hocus pocus sort of persuasion.
The Free Masons wasn't a bad direction, but got that covered as I am an Ancient Free And Accepted Mason. There is no discussion of "religion" per se' in our lodge meetings or other organized get togethers, and the fundemantal (without getting to involved) obligations and unbending beliefs and promised commitments are as follows:
While FM have a great deal of symbolism, almost all of it steers clear of any dedicated religious affiliations. Yes, one can argue that some symbols seem religious in nature, but are most likely relegated to God or that higher power. Nuff on that.
That said, there could be something more applicable to the Knights Templars, as that follows 'after' Free Masonry. I am not a Knights Templar, but have looked into many of it's studies and symbolism, and see some liknesses as mentioned in this thread.
**But most of all, I am in the camp of some sort of Lorraine cross with Shield Of Trinity, being represented for some shift in the basic 'beliefs' but perhaps modified for a particular group at the time(?). In any case, I am now believing this cross/symbol/pendant whatever it truly represents is indeed very old, and had a strong belief system tied to it, at it's given time.
Thanks to all of you for your replies, and I hope more folks chime in if they have further knowledge or experience understanding it.