While >>12110680 is definitely on the right track, there's a few ways we could take this, in addition to what was already mentioned:
I also like looking at certain… "philosophies" that iterate through the maternal line.
Many marriages aren't done for the sake of love, but power - especially within "royal families".
Then there's the sort of secrecy games they play with the name changes and with women who don't take their husbands names.
I'm sure we could keep going, but I'd think the most important thing we seem to have found so far is a trend where people place wives within certain boards or committees. This is largely done to launder money, consolidate power or to hide influence. We can see the Biden family connections that sprawl out to SolarWinds, for instance.