Have just had a play with your names and found this....from the 10% census sample,could they be yours? Enfield to Harrow is perfectly possible.
1851 United Kingdom Census Sample
Name Residence
(ED, County) Birth Place Gender Age
Ellen Pennyfather Enfield, Middlesex Middlesex, England, Enfield Female 3
Emily Pennyfather Enfield, Middlesex Middlesex, England, Enfield Female 0.48
Emma Pennyfather Enfield, Middlesex Middlesex, England, Enfield Female 8
George Pennyfather Enfield, Middlesex Middlesex, England, Enfield Male 6
John Pennyfather Enfield, Middlesex Hertfordshire, England, Wellwyn Male 34
Lydia Pennyfather Enfield, Middlesex Middlesex, England, Enfield Female 31