Not to take anything anyway from the Olympic athletes who are incredibly talented at their sport, but their sport doesn't resemble the practical shooting of real guns.
America is a nation of immigrants and many families keep ethnic names alive through generations.
Xuefeng Cao is American and prefers to go by Luke. Lives in Maryland.
Nils Jonasson is from Phoenix, AZ.
I'm not seeing where Elias was born but he did go to college in Tuscon, AZ. Given his abundant praise of God and the USA I'm inclined to believe he may be, in fact, very American.