Ancestry Match – 1st Cousin or Half-Sibling? › Forums › DNA › Ancestry Match – 1st Cousin or Half-Sibling? Tagged: Cousins, DNA, Forensic Genetic Genealogy, Half-Siblings, Siblings This topic has 0 replies, 1 voice, and was last updated 10 years, 5 months ago by wmdoran. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In