ladyships

It persists in German where "they" is the formal "you" (it's the pronoun for something like "your lordships/ladyships").

Quick Hit: Waiter Weirdness - Feministing

One man who understands that his days as an MP are almost certainly numbered is John "Hospital Hoax" Leech who has immediately tweaked his rhetoric to attack their Tory lords and ladyships.

Liberal Conspiracy: Lib Dems Must Attack Tories

“I am sorry to have offended your ladyships,” Lyle returned.

Sexy Beast IV

The family surgeon rode over and paid his respectful compliments, and inquiries for the health of their ladyships.

Vanity Fair

Their ladyships made three stately curtsies, and the elder lady to be sure gave her hand to the newcomer, but it was as cold and lifeless as marble.

Vanity Fair

I am much obliged to your ladyships, said Mrs. Jervis: Will your ladyships please to sit down?

Pamela

The women of the two ladies had acquainted their ladyships with the order I observed for the day, and the devout behaviour of the servants.

Pamela

“His lordship and their ladyships have been here often,” the servant said, with much importance.

The Virginians

Yes, he would ride with their ladyships, and he was sure they need fear no danger.

The Virginians

‘It will be just like Duncan Mac – Girdie’s mare,’ said Evan, ‘if your ladyships please, he wanted to use her by degrees to live without meat, and just as he had put her on a straw

Waverley