In 1890, Whitehead married Evelyn Wade, an Irish woman raised in France; they had a daughter, Jessie Whitehead, and two sons, Thomas North Whitehead and Eric Whitehead.
1890 giftede Whitehead sig med Evelyn Wade, hun var irsk og havde vokset op i Frankrig; de fik en datter, Jessie Whitehead, og to sønner, Thomas North Whitehead og Eric Whitehead.