Nick and Sarah Allan:

Nick or actually Nicol Allan  (1931–2019) was an American artist known for his paper collages.

Sarah Allan No photo found. (born 1945) is an American paleographer and scholar of ancient China. Which explains the Hong Kong address. She was a Burlington Northern Foundation Professor of Asian Studies in the Department of Asian and Middle Eastern Languages and Literatures at Dartmouth College; she is currently affiliated to the University of California, Berkeley. She is Chair for the Society for the Study of Early China.

There is no reference to either of them in the DOJ Epstein Library.

References:

1. https://www.nicolallan.com/about
2. https://en.wikipedia.org/wiki/Nicol_Allan
3. https://en.wikipedia.org/wiki/Sarah_Allan
4. https://epsteinsblackbook.com/names/nick-sarah-allan