Hey there!! I-m from Mexico ,what I know about our surname is originally from France ,but brought to spain from there to America and there are a lot of Garduño's .Most of the Garduño family in Mexico is from Toluca,My great grandfather was Felix Garduño,my grand father was Francisco Garduño Contreras. and I think my greatgreat grand father wasfrom Spain,I'm not sure. that's all I know so far. Take care.