Are there black and white surnames in the United States?

This cannot be generalized, because white Americans are basically European immigrants. The surnames of pure-blooded whites largely retain the surnames of their Irish, Italian, Spanish, and French ancestors, while whites of Latin American immigrants More surnames come from their earliest Spanish and Portuguese ancestors. As for black Americans, due to the slave system in the American South, part of them retained the surnames of their African ancestors (such as Obama), and part of them inherited the surnames of their slave owners. The black people in the north were more assimilated by the white people and inherited the white people's surnames. In modern times, due to the accelerated integration of the population, more surnames have been integrated and assimilated. In many cases, they no longer fully reflect the origin of their ancestors.