Samuel might not have been the only one to have named his children after his parents. On one census there is a Thomas Keen who has children named George, Isabella, James, Phillip, Samuel and Eliza!! Talk about keeping it in the family!
I have found Phillip and Isabella on more census returns:
1851 Census (Ho107/1841, f 4, p1)
Church Street, Broughton Gifford
Phillip Keen Head 52 Farm Labourer born Wilts, Broughton
Tibella Wife 53 Farm Labourer born Wilts, Broughton
Septtums Son 13 Farm Labourer born "
Emma Daur 11 Do Schoolar born "
Eliza Daur 7 Do Schooolar born "
(Think the enumerator had a few literacy issues!)
1861 Census (RG9/1297, f 2, p 1)
Church Green, Broughton Gifford
Phillip Keen Head 66 Pauper born Wilts, Broughton
Isabella Wife 63 born Wilts, Broughton
1871 Census (RG10/1923, f 27, p 3)
Brougthon Common, Broughton Gifford
Isabella Keen Head Wid 74 Pauper Wilts, Boughton
1881 Census (RG11/2049, f 20, p 15)
Broughton Common, Broughton Gifford
Isabella Keen Head Wid 83 Widow of Agri Lab, no occuaption born Wilts, Broughton Gifford
Mary Mortimer Daur Wid 61 Nurse Born Wilts, Broughton Gifford
Phillip died in Jun 1868 (vol 5a, p76), Isabella died Jun 1884 (vol 5a, p 85), both in Bradford reg. district.