It might be a linguistic shortcoming on my side, not being a native English speaker, but in the Player's Guide it says:
"The Knights of the Dying Sun, also called Sun Knights or Templars, are the armed wing of the Church. Its well-equipped and highly skilled Templars, who all stem from noble families,"
while in the Bestiary it says:
"With few exceptions, all the Sun Church’s Templars come from lowborn families. They know how to conduct them-selves, but care little for manners or etiquette when facing the apostles of darkness."
Is lowborn still nobility?