Arthur married Eula Harriet Thompson on 8 May 1902 in East Livermore Falls, Androscoggin, Maine, USA. Eula (daughter of Cliford Rudolphus Thompson and Alice M. Kyes) was born on 2 Jul 1882 in Jay, Franklin, Maine, USA. [Group Sheet] [Family Chart]

1. Kenneth T. Masterman was born on 1 Sep 1902 in Enfield, Hartford, Connecticut, USA; died in May 1973 in New York City, Bronx, New York, USA.
2. Richard A. Masterman was born in 1905 in Enfield, Hartford, Connecticut, USA.
3. Evelyn A. Masterman was born in 1908 in Enfield, Hartford, Connecticut, USA; died in 1959 in Springfield, Hampden, Massachusetts, USA; was buried in Springfield Cemetery, Springfield, Hampden, Massachusetts, USA.