Answer
Phabsomphou is Sunisa Lee's birth surname, reflecting her Laotian heritage. Her parents, Yeev Thoj and John Lee, emigrated from Laos to the United States before her birth. Sunisa adopted her stepfather's surname, Lee, after her parents divorced when she was young. Despite the name change, she remains connected to her Laotian roots and has spoken out about the importance of Asian American representation in sports.