My last name is de Castro from my late dad in Altura, Tanauan, Batangas...they looked like part spanish. My middle name is Reyes from my mom in SanFernando, Pampanga...they looked like part chinese. My questions are how my last name and middle name originated? And if me and my siblings have any spanish blood and chinese blood? Any help will do so i won't be confused with my ethnic identity.