How do you pronounce the english surname of a famous artist-Derges
This video of a news report on photographer Susan Derges (the only result for a Google search on "artist derges") has it as durr-jess, with the emphasis on the first syllable.
The name seemed to have switched to Burgess in France around 1600. My guess would be something similar to that. There's only 33 people in the US with this name apparently, very little information to go off of besides possibly e-mailing someone with the name or scouring ancestry.com