Jack Wills was born on 27 February 1884 in the
Birmingham suburb of
Erdington, into a prosperous and well-educated manufacturing family, with an interest in science. His paternal great-grandfather, William Wills, had been a prosperous Birmingham attorney from a nonconformist,
Unitarian, family. William Wills was involved with the
British Association for the Advancement of Science and wrote various papers on meteorology and other scientific observations. Jack Wills's grandfather bought an edge-tool business in Nechells, AW Wills & Son, which manufactured such things as scythes and sickles. Jack Wills's father, William Leonard Wills (1858–1911), was a science graduate of
Owens College, Manchester, and took over the running of the family business. He was interested in botany, zoology, geology and natural sciences generally, as well as in the developing science of photography. His mother, Gertrude Annie Wills née Johnston (1855–1939), was the only daughter (with six brothers) of a well-known Birmingham doctor, Dr James Johnston. One of Jack Wills's great uncles was Sir
Alfred Wills, a well-known Victorian mountaineer and judge. Sir Alfred was a founder member and early President of the
Alpine Club, and was interested in the origin and shaping of the Alps – an interest which may well have influenced his great-nephew. Sir Alfred translated from French into English one of the classic early works on the geomorphology and glaciology of the mountains,
Louis Rendu's
Théorie des Glaciers de la Savoie (1840). As a judge, Sir Alfred presided over
the second Oscar Wilde trial and sentenced the writer to two years in Reading Gaol. ==Early years and school==