I was talking exclusively about the Marconius Kiasyd embrace. The Maeghar can only embrace fae-blooded mortals, otherwise, they turn out as Caitiff. The same apply to Marconius bloodline OR, contrary to the Maeghar, they are a "true" bloodline capable of embrace freely? i.e: normal mortals, passing down the bloodline traits? V20 the Black Hand: a Guide to the Tal'Mare'Ra and V20DA implies NO mechanical differences between Maeghar and Marconius Kiasyd, which lead to the implication that the same limitation DO apply to the second. That said, we should imply that ALL Marconius Kiasyd were fae-blooded mortals before the embrace? Thats when we are forced to houserule (because we don't know) AND, V20 outlook of the Marconius bloodline is now outdated, leaving us only with the two books above. IF this differences do occur, they should be made clear, otherwise, by omission, im forced to consider the general rule, which is, Marconius Kiasyd are only ordinary Maeghar and the differences are nothing more than political differences, not methaphysical/physiological differences. Thats house ruling (by omission, not by choice obviously).
Edit: The Lore of Bloodlines chapter about Kiasyd are exclusively dedicated to Marconius Bloodline or Maeghar as well? If so, the mechanical differences should be expecified if they do exist.