William Pengelly was listed as being the head of the household in in 1911 census, aged just 13 and living with his 11 year old sister and 9 year old brother

Pengelly, William Thomas
Birth
1897-5-6
39 James Street, Devonport
Baptism
1897-6-20
Census
1901--
Belle View, Tamerton Foliott, Devon
Census
1911--
15 Prince Maurice Road, Plymouth
Marriage
1920-10-13
The Register Office, Devonport
Marriage
1933-2-4
The Register Office, Plymouth
Death
1960-6-16
49 Alexandra Road, Crownhill, Plymouth