Perhaps you should try some spelling variations:
"silva, jose alfonso da" » "silva, gomez alfonso da" (Expand Search), "silva, bores alfonso da" (Expand Search), "silva, jaime alfonso da" (Expand Search), "silva, jose alfonso de" (Expand Search), "silva, jose afonso da" (Expand Search), "silva, jose alfonso a" (Expand Search)
"silva, jose antonio da" » "silva, jose antonio de" (Expand Search), "silva, jose antonio la" (Expand Search), "silva, jose antonio a" (Expand Search)
"silva, jose alonso da" » "silva, jose alonso de" (Expand Search), "silva, jose afonso da" (Expand Search), "silva, jose alonso mas" (Expand Search)