Henrietta was born in year 1839 in Brighton, Sussex and was baptised on May 3rd, 1839 in St Nicholas, Brighton, Sussex. Henrietta's father was Henry Pocknell and her mother was Sarah Holden. Her maternal grandparents were Thomas Holden and Sarah. She was the youngest of three children. She had a brother and a sister, named John and Sarah. She had a half-sister named Jane. She died, at the age of 2 years, on October 15th, 1841 in Uckfield, Sussex.