Hi Vincent,
My father Roberto Coto is from El Salvador, San Salvador. His father was Victor David Cotto he was married to my grandmother Raphaela Mejia from Honduras. My father Roberto has only 2 siblings left, Hilda Cotto and Mario Cotto who reside in San Salvador. I hope that you have reached more info since 2006. But I have found that in those days and especially in central America many people did not register their children ( grandparents and prior the 1900's therefore it is very difficult to find our ancestors. In my quest have 2 different ways of spelling Cotto/Coto which becomes twice as hard for both of them have different origins. Hopefully you have been able to advance in your quest to find your father.