THat is interesting, I grew up in sonsonate, but my grandma, from my mother's side lived in san ramon, I had many cousins in san ramon, their last name is Crespin, Ricardo crespin, Boris, Cesar, and more but not have the last name Zarate because they are from my monther's side. I used to go to san ramon when I was a kid.
My father had many brothers, Roberto Zarate that never got married and never had kids, at least we never knew about it, Luis Zarate who lived mostly in Santa ana, and others who died long time ago. He also had sisters called Carmen and teresa, they are both dead now. There was one sister that he never knew where she was since the age of 20 I think.