Anyone who knows the history of the USA knows the importance of its political and business dynasties, to the point that I don't need to name any names, because everybody knows about them.
That dynasticist phenomenon is typical of all non-monarchic countries. For ex, in Colombia, the Restrepo family--a family that includes politicians, military men, businessmen, churchmen and writers--is so important that about half of the presidents of Colombia are related to it. If Colombia ever decides to become an hereditary monarchy, the obvious inevitable choice for royal family will be the House Restrepo.
'tis really remarkable how dynasties are so important in non-monarchic countries; in fact, the case can be made that dynasties are totally essential for the wellbeing of all countries--so long, of course, as we are not talking about quasi-crime families such as the Castros, the Duvaliers, the Somozas and the Trujillos.
How is it in your countries? Which dynasties do you have that play a key role in your political and business societies?