Dolphin was married to Doris Alexandrine LeGendre Stovel had several children (Nancy Jane Dolphin (1937-2002), William Dolphin, Flight Lieutenant Douglas Dolphin (d. 1944) and Robert Dolphin).
One was procured by the U.S. Navy as a transport for President Franklin D. Roosevelt.
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The first two were purchased by Wilmington-Catalina Airlines to fly passengers between Los Angeles and Santa Catalina Island, becoming the first successful Douglas airliners.
Douglas MacArthur | Douglas | Douglas DC-3 | Douglas Adams | Michael Douglas | Douglas Fairbanks | Douglas Bader | McDonnell Douglas | Kirk Douglas | William O. Douglas | Alec Douglas-Home | Douglas C-47 Skytrain | Lord Alfred Douglas | Douglas Mawson | Douglas Aircraft Company | Douglas Niles | Douglas, Isle of Man | Douglas Haig, 1st Earl Haig | Douglas Fairbanks, Jr. | Douglas DC-6 | Douglas Hofstadter | dolphin | Paul Douglas | Douglas Hurd | Douglas County | Mike Douglas | Jerry Douglas | Douglas fir | Douglas Coupland | Tommy Douglas |
It operated various Loening seaplanes, Dayton-Wright DH-4s, Thomas-Morse O-19s, Sikorsky and Douglas Dolphin amphibians, as well as other aircraft that the Army would send from the United States that it thought could be used in the Philippines.