He was married to Dame Gertrude Cosgrove from 1911 until her death in 1962; they had four children, including a son who was killed in World War II; another son, Henry Cosgrove, became a Judge of the Supreme Court of Tasmania.
Gertrude Stein | Gertrude Dunn | Gertrude Lawrence | Gertrude Berg | Saint Gertrude | Gertrude | Gertrude Jekyll | Gertrude Bell | Gertrude Atherton | Gertrude (Hamlet) | Miranda Cosgrove | Gertrude B. Elion | Gertrude Tuckwell | Gertrude the Great | Gertrude of Nivelles | Gertrude of Flanders, Duchess of Lorraine | Gertrude of Brunswick | Gertrude Kleinová | Gertrude Himmelfarb | Stuart Cosgrove | St. Gertrude Roman Catholic Church | Robert Cosgrove | Ray Cosgrove | Mark Cosgrove | John M.G. Cosgrove | John F. Cosgrove | Henry Cosgrove (judge) | Henry Cosgrove | Gertrude Warner | Gertrude Vanderbilt Whitney |