The names of 10 people who died on the flight were released by the US Coast Guard.
The authorities identified nine adults, including the pilot, and one child who were aboard the commercial plane that crashed Sunday afternoon in Mutiny Bay.
The victims were identified by the coast guard.
Mr. Mickel, the founder of Ross Andrew winery, his wife, Ms. Hilty, and their child were on the flight.
Ms. Williams was on her way home after a vacation in the San Juan Islands, according to her brother.
The seaplane left Friday Harbor,Wash., and was headed to Renton,Wash., according to the Coast Guard. Before it was called off on Monday, the search had spanned over 2,800 square miles.
The crash is being investigated by the transportation safety board.