Hi Paul,
I found my ancestors in the Brownsvile,Cameron County. Fabian Echavarria married Benita Solano. They had Austencio, Margarita, Teodosa and Juana Echavarria. Austencio had Cristobal and Ramiro Echavarria. Do any of these names sound familiar to you. I, also, found my Castillo and Saenz relatives in the Brownsville area. I did this by checking the census records. I am still looking and will pass any information I find. Please let me know if you received this response.
Pedro (Pete) Sanchez