Alva Davis was his mother and a branch of the Davis family -- the Cortissos line -- can be traced back to Barcelona at the time of the Spanish Inquisition in the 15th century .
Alan Collins was their great - great - grandson .
Alva Davis was Alan Collins ' mother and a branch of the Davis family -- the Cortissos line -- can be traced back to Barcelona at the time of the Spanish Inquisition in the 15th century .
Alan Collins was their great - great - grandson .