Gillian Anderson 's family.

Gillian is the daughter of Rosemary Anderson , a computer analyst, and Edward Anderson, who owned a film post-production company.She has two younger siblings. sister Zoe Anderson (actress) and brother Aaron Anderson
( Aaron, suffers from an extremely common but grossly misunderstood genetic disorder called Neurofibromatosis, or Nf for short) 

Gillian and her sister Zoe

Gillian with her mother and little brother Aaron