[@John F Kennedy] The information looks good, the only big thing is this bit:

[quote]Men of House Marietta are known for suffering unfortunate fates and untimely deaths, while the women of the house either have unnatural and unholy youth in which wrinkles never form, or they have wicked faces and crippled bodies.  This is attributed often as a sign of the house's foul heritage.[/quote]

This sounds a little too much like magic for what's in the RP, and more specifically the coinflip of having "unnatural and unholy youth" or looking like the Baba Yaga. My own suggestion would be to change it to something more tame that can be explained by a genetic mutation or disorder that because of a lack of knowledge of genetics is commonly attributed to magic (you don't need to directly say it if you don't want).

[quote=Example]"Men of House Marietta are known to often be born sickly and more commonly than not possess frail bodies and weakened immune systems. The women of House Marietta however seem to be mostly immune with the large majority of them being born healthy. The women also often appear younger than one would expect of their age. Popular superstition of House Marietta among the smallfolk says that this is a sign of their foul lineage and that their blood is cursed with the women taking the vitality of the men while still in the womb some how."[/quote]

Realistically this could be explained by some sort of recessive trait that is expressed through the Y gene so only men get it. Looking younger in old age isn't that uncommon irl either and there could have been a degree of natural selection: House Marietta was known for being shady even in the old days meaning only the most beautiful would be able to break through the dark reputation. This has probably subsided since the start of political marriages though.