The 1850 Valencia County Census have 22 Silva,Silba or Silbia or Silber families Four have a Francisco or Jose F.as follows:
Silva,Ciderio 26 M NM
Francisco 20 F[?] NM
Maria 6 F NM
Castillo,Guadalupe 12 F NM

Silber,Jose M.A. 21 M NM
Fran. 19 M NM
Gabino 3 M NM
Montollo,Domingo 16 F [?] NM
Silbla,Fran. 29 F NM

Sanches,Tomas 80 M NM
Sebedra,Bartola 48 M NM
Montollo,Maria 16 F NM

Silva,Jose F. 60 M NM
Maria A. 19 F NM
Maria C. 1 F NM
Montollo,Gertrudes 90 F NM