His father was Edward Augustus Crowninshield (1817–1859) and mother was Caroline Maria Welch (1820–1897).
[1] He had two older brothers: Francis W. Crowninshield was born in 1843, and died from wounds in the American Civil War in 1866.
Brother Edward Augustus Crowninshield was born in 1841 and died a year later.
Crowninshield then moved to New York, where he was the first president of the National Society of Mural Painters a position that he held from 1895 to 1899.
Helen Suzette Crowninshield was born in Paris July 28, 1868, and married Carl August de Gersdorff on September 18, 1895.