Syn is a goddess, possibly of the Disir, and a handmaiden to Frigg.
Syn is the goddess of truth, justice, honor, and oaths. When taking an oath, it is often sworn upon her, and Odin of course.
But beware, while breaking any oath is terrible, breaking one on her name cannot get much worse. She will find you, and she will punish you. If I am correct, I think if you break an oath sworn to
her you shall be slain by your own weapon. So, not good!
Believe it or not, that is about all there is to know about Syn!
So, if you know more, let me know and I shall add it!
But for now, thats it!