[1] She was born 23 August 1906, in Nueva Caceres (now Naga, Camarines Sur) to Atanacio San Andres and Marcelina Ravago.

San Andres Ziga obtained her elementary education from the Santa Isabel College.

[1] San Andres Ziga first worked as an assistant attorney at the DeWitt Law Office.

After topping the said examination, San Andres Ziga worked for the Department of Justice.

Her political agenda as senator focused on the protection of women and children and regulation of practice in dietetics, among others..[1] She ran for re-election in 1969, but lost Tecla San Andres Ziga was the wife of Venancio Ziga, a former governor and then congressman of the first district of Albay, Camarines Sur.