|Nguyen Thi Xuan-Hong|
|Spouse(s):||Nguyen Dinh Van|
|Children:||Yh'ahni (adopted daughter)|
- As is custom with some cultures, Nguyen Thi Xuan-Hong's name is listed in order of last name, middle name, first name.
In 2345, military members of Yh'ahni's race attacked the Federation starship Dr. Nguyen Thi Xuan-Hong and her husband Nguyen Dinh Van were crewmembers aboard. The Nguyens and several others escaped to a derelict Starfleet starship (as their ship was destroyed), where they found a pregnant woman (also of Yh'ahni's race). Mortally wounded, she begged the Nguyens to help her give birth then take the child to safety.
After the alien gave birth to her child, she told Dr. Nguyen she wanted her daughter to be named Yh'ahni. The alien then passed away without explaining why the military of her own race was attacking her and the others, or how she got aboard the derelict ship.
The survivors somehow defeated the aliens and made a dash for Federation space in whatever craft they could find or salvage or gain safe passage on. Yh'ahni recalled growing up experiencing many different cultures and societies on their way back to the Federation. (Star Trek: The Cantabrian Expeditions: "Catalyst, Part One", "Finding the Edges of Who She Is")