His younger brother, Hayden ('Bill') Mills, was born two years later in about 1902. In about 1900, Herbert Mills, the third son of Herbert Stephen Mills was born. Mills, Herbert's second son, was born in July 1898. Mills, the first of Herbert Mills' sons, was born. Mills, the youngest of Mortimer Mill's children was born. One son, Herbert Stephen Mills, was born in 1872 when his father was about 27. The origins of the business lie with Mortimer Birdsul Mills, who was born in 1845 in Canada West (today's Ontario, Canada) but who later became a citizen of the United States, resident in Chicago, Illinois.