Both her older sisters Rosina Emmet Sherwood (1854–1948) and Lydia Field Emmet (1866–1952) would also become successful artists, as well as their first cousin Ellen Emmet "Bay" Rand (1876–1941). Emmet de Glehn's brother, William LeRoy Emmet, was an accomplished engineer employed by General Electric; a graduate of the United States Naval Academy at Annapolis, he was a pioneer in the areas of current electricity and power generation, best known for his work with steam turbines, mercury vapor, and electric ship propulsion.
Both her older sisters Rosina Emmet Sherwood (1854–1948) and Lydia Field Emmet (1866–1952) would also become accomplished artists, as well as their first cousin Ellen Emmet "Bay" Rand (1876–1941). Emmet de Glehn's brother, William LeRoy Emmet, was a skilled engineer at General Electric; he graduated from the United States Naval Academy and pioneered work in current electricity and power generation, especially with steam turbines, mercury vapor, and electric ship propulsion.