Hi Min i have checked back a bit further using the IGI indexes.Frances COLEGROVE, Birth:  31 AUG 1770 Christened 01 JUL 1771   Thurleigh, Bedford, England  Father:  SAMUEL COLEGROVE  
  Mother:  SARAH  It says wife was Frances Bourne marriage:  19 AUG 1798   Thurleigh, Bedford, England I think if You Check her Name Will Either Be Francis Ann or Ann Francis,This would be why son Named Frances After His father And Mother

 

Mike