It's stupid and it's made up like all the white families naming their little crotch goblins McKynnsleeeiyghe. Please give your kid an actual name that doesn't sound like "duck one" or "da quack".
I guess if you're desperate enough, you could say that Daquan means "successful soldier", "Da" being Chinese for "achieve" and "Quan" being Vietnamese for "soldier". I still wouldn't recomend this, but for all you Daquans out there, now you have somewhat of a meaning, if your parents intended it or not.