Half siblings definitely looks like a good possibility--the cousins look like cousins, the aunt looks like an aunt, and the suspected half sibling looks like a half sibling--all of those people came up in the range you'd expect to see.
Network President Jenny LeFevre, Agent Orange Victims and Widows Support Network, attributes more than 250,000 deaths to Agent Orange, a toxic herbicide the U.S. military sprayed over Vietnam from 1962 to 1971.
If a Vietnam veteran is diagnosed with one or more of the following cancers and can provide documentation of Agent Orange exposure, he or she is eligible for benefits, including free medical care. Both Hodgkin lymphoma and non-Hodgkin lymphoma. Lung cancer. Cancers of the bronchus, larynx (voice box), and trachea.