Frank Bunker Gilbreth, Sr.

Frank Bunker Gilbreth, Sr. was an early advocate of scientific management and a pioneer of motion study, and is perhaps best known as the father and central figure of Cheaper by the Dozen. He and his wife Lillian Moller Gilbreth were themselves industrial engineers and efficiency experts who contributed to the study of industrial engineering in fields such as motion study and human factors.

Gilbreth was born in Fairfield, Maine on July 17, 1868. He was the third child and only son of John Hiram Gilbreth and Martha Bunker Gilbreth. His mother had been a schoolteacher. His father owned a hardware store and was a stockbreeder. When Gilbreth was three and a half years old his father died suddenly from pneumonia.75

Source: Wikipedia