Families

It should be no surprise that with the combination of thousands of worlds and faithful Christians and Muslims as the principle inhabitants of the universe of New Diasporia, that large families are the norm rather than the exception.
Family dynamics tend to be different from the historical trends. The Progressive Era tended to see the age at which couples initially married increase (as it also saw the duration of marriages decrease,  and eventually the total number of marriages diminish.) This was blamed on a variety of causes, but mostly on the requirement of increased education and economic factors. Historians agree that the real cause was a combination of unhealthy materialism and disordered self-absorption.
Modern Highland families tend to marry during their early twenties. This is made possible through the support of larger families which reduce the necessary economic burden of marriage. Marriages tend to last very long, since anagathic nanotech factories have extended human life far beyond earlier eras. Compatibility between prospective spouses is more readily assured by stringent Pre-Cana requirements for anyone contemplating marriage, as well as widespread moral support for the virtue of chastity.
Large Catholic families tend to include various members who choose not to marry, either for religious reasons or due to temperament. Not every man who chooses not to marry is suitable for the priesthood, monastery or hermitage.  Nor is every woman who chooses not to marry suitable for the cloister or religious life. Chaste single life apart from the formal orders of the Church is an honorable vocation, and one that carries no stigma. Some do eventually spend some time in discernment, but many return to the world to live on as ancillaries to their families as beloved aunts or cherished uncles or even to marry late in life.
Large families tend to accumulate greater wealth. They take better care of their older members, rather than pushing that duty off on the state or leaving it to the individual. Under Distributism many businesses are family businesses. A large number of brothers, sisters, aunts, uncles and cousins tends to mean that there are always enough family members interested in the family business to allow some family members to choose the Church, military or government as viable alternatives without effecting the ability of the family business to survive.
From a game play point of view this means the the chances are the individual Player Character  has a large retinue of near and far relatives, the balance of which may be at their ancestral home, but many who might be in the bosom of the Church, military or government and stationed almost anywhere.
It also means the lone wolf, orphan or solitary character is likely to have an unusual background. Of course it is not unlikely that adventures are more apt than not to have come from such an unusual background.