Can pedigree be used to describe people?

Yes, but only if used in the right context.

For example when people say 'pedigree' they usually mean being a pure breed.

Often referred to as an animal which is of pure breed that (usually an animal) which has genuine parents of the same breed.

If you were talking about a person, You would usually mean "She/He is pedigree" meaning they have parents that are the same race.