Mildred Taylor was born on 12 April 1909 at Heckmondwike, the daughter of gas rent collector William Oswin Taylor and his wife Annie (née Haigh).
She married Harold Coldwell in 1938 and the couple were residing at 14 Newsome Road South, Huddersfield, at the time of the 1939 Register. They had at least 3 sons, including:
She died in 1997. Her husband pre-deceased her in 1994.