Well, the So-and-sos have slipped gradually into your life; let this be granted.
And the endless luncheons where they gossip about so-and-sos love affairs.
I was to live all summer in the apartment of the So-and-Sos while they were away.
It was once the mansion of the So-and-sos, one of the first families, but they're very poor now.
Or of So-and-sos lemon squash, preserved ...