Well, at the moment, we know a considerable amount more about Sean Renard than we used to. We know that he is a titular Prince at least, by virtue of being the son of either a Prince in direct line from the throne or the King himself. What exactly his official titles might be or what his father is Prince or King of, we don't know. We know that he's half-Hexen from the showrunners themselves, and that he was raised up to a point Europe, schooled in Switzerland, then dragged off to the US by his mother at a young age to avoid a potentially lethal scandal. While he eventually ended up in Portland, their destination at the time was referred to as "the farther reaches of the Louisiana Purchase" by Eric, of which Oregon was never a part. We have seen the Louisiana Purchase mentioned once before as connected to the metaplot, in the context of Aunt Marie's Montana license plate. Other than that, all we have is speculation, which appears below. We know that Renard is considerably monied judging by his places of residence. We know that he's descended at least from Eric's line by his father and most likely from some line involving Italy from either parent going by his comment about the painting (Island of Dreams, 1x15), which is 16th century and Italian. We know that his family on one side or both lost a great deal of power in a revolution, but contrary to common belief we do not know which revolution. There were a number of revolutions around the late 17th and through the 18th century in a number of different countries. We can extrapolate that he is still connected via his mother to some sort of Royal family influence because he knew Wolsey since he was a young man (Love Sick, 1x17) and at the very least he seems to have kept in sporadic contact with him.
As of this writing (Endangered 2x19) we know very little about Eric Renard. We know that he is a Prince in direct line of succession (to what we don't know; there may be multiple thrones involved), and at the very least he believes himself to have/have had a chance at securing his own throne. We know that he is pure blooded (pure WHAT remains an open question) and that although he is currently unmarried, he has had at least
Alas, poor Anton Krug, we knew him not very well and cared not a bit to know him further. For him, we know that he was a cousin to the brothers Renard, no inkling on which side. If it's father's, Wolsey was the Renards' retainer as well as the Krugs' and the Renards kept tacitly in touch with Sean's mother, if it was Sean's mother the Krugs aren't related to the Renards much at all. He has a German-speaking paternal family, from Zurich or at least near enough (or has business interests there) that he flew out of Zurich. We can guess he is/was likely considered expendable. Speaks German, French, English. (Love Sick)
As for the mysterious Mia Gaudot, we know that she is unmarried and has enough power within the Families to negotiate terms for them unaccompanied by any male member of her family. We know she is un-ringed, but not the meaning of that. We know she is a former lover of Sean Renard. That she has or is building connections to the Dragon's tongue. She speaks English and most likely Japanese. (Over My Dead Body)
Renard's canary is another one we know little to nothing about. We know that he's a royal, he has a ring. And access to Interpol databases. We know that he speaks French and English, that he considers himself allied with Renard in some endeavor that runs counter to at least one Royal Family's interests, and that he has reason to want to help Renard protect Nick or the key or both. We can infer from his reactions to proximate violence that he is unused to it. Most of all that isn't very helpful, though. We can add to that that he knows Meisner and has a more direct or more secure or both connection with him. He was the one to pass along the kill order on Eric Renard, and appeared more subordinate to Renard in that conversation than in any interaction previous. (Quill, The Good Shepherd, Nameless, The Ungrateful Dead) As of 3x03 we do have a name for him, though! Sebastien, who also seems to have upped his clandestine abilities and/or brushed off an old set of skills. We're not sure which, as yet.
We know that Papa Renard exists via a phone call to Eric Renard, though nothing beyond that, not even what he sounds like. Given the obituary in PTZD, we are clearly meant to infer that he's the king of the Kronenberg family, though it's possible that's a deliberate red herring.
We know that Renard's mother exists and that she is pleased by Eric Renard's death and believes (rightly) that her son was responsible. Also that she wants to talk to him in the future, with an implication that this will be an in-person conversation. Based on Renard's reaction to the phone call, we may safely assume that she's been out of contact with him for quite some time. (PTZD)
As for Royals in general, we know a little more. Most of them have rings, or at least all the men do, some sort of silver signet ring. We know that they employed Grimms starting from some point in the past going at least as far back as the second Crusade, (no data available on what the terms of this employment were or how and when this changed, though in Cat & Mouse Ian referred to some change that sounded recent as compared to an 800-year history, so 'recent' could be highly relative) and had a relationship with the Verrat. We have heard that they formed the Verrat in 1945, but considering we also have evidence for the Verrat having existed in 1936 it remains to be seen whether or not this is accurate. We know that they are diminished in power and that at least part of that diminishing coincided with a historically documented revolution. We know they participated in the Crusades or at least the Second and Third Crusades, they employed knights, and were pissed off when the knights didn't hand over the ultimate weapon to them. (Bad Teeth/The Kiss/One Angry Fuchsbau)
