In the 1901 Beeston census William Issom's birthplace is given as "Night Low Will", Warwickshire. I think this is Knightlow Hill, in the parish of Ryton on Dunsmore. There is a baptism of William, son of John and Ann Iseham (or Ischam) on 21 Aug 1853 at nearby Stretton on Dunsmore, and also Sarah, daughter of the same couple bapt 21 Nov 1847 in the same parish. There is a marriage of John Isom and Ann Ingram 26 April 1846 at nearby Bourton on Dunsmore. In the 1851 census John (aged 46) and Ann (aged 27) Iseham, with daughter Sarah (aged 3) are residing at Stretton on Dunsmore. John's birthplace is given as Gristworth, Northants, which I think is Greatworth. There was a John Isom son of William and Elizabeth Isom bapt at Greatworth, Northants on 8 Apr 1803.