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.
Stroke has been added to the growing list of possible health effects Vietnam veterans may face long term after exposure to Agent Orange. In response to new evidence showing a statistically significant overall increase in stroke associated with exposure to chemical in Agent Orange, a committee examining these health effects has moved stroke to the limited and suggestive evidence category.