Sotheby
Sotheby (name) means an English surname, best known as the name of the famous auction house founded in London. Example: “The painting sold for millions at Sotheby's.”
Fill the gap
Can you complete this real example?
The painting sold for millions at _____'s.
Etymology
"The man who lives south in the village", from Old Norse suðr i bý (“south in the village”). The surname presumably comes from a now defunct placename in England.