Ybarra y Vital Surname

I am trying to help a friend with her family tree. She is descended from Tomas Vital and Ygnacia Gutierrez of Jalisco.

Tomas is the son of Ramon Vital that is some records is listed as Ramon Ybarra y Vital, and sometimes Vital-Ybarra, or Ybarra Alias Vital. Where did Vital change from Ybarra? These people settled in Arandas, Degollado, San Miguel el Alto, San Diego de Alejandria.

Emilie
Port Orchard, WA