From information provided by dathai in your previous post, it seems that Horace Victor's parents were Horace Dillon NANKIVELL and Florence Kate MORRIS. They are easy to follow through the censuses free to search on familysearch.

Horace Dillon NANKIVELL born 29 October 1877, bap 12 April 1880 at East Dereham, Norfolk, to parents William Henry NANKIVELL and Emily HARDIE/Y.
William Henry NANKIVELL born c1840 Cornelly, Cornwall.
[possibly William Henry NANKIVELL Jun qte Truro (9/321), mother's maiden name DILLON]
Emily HARDY born c1846 Cambridge (according to the 1881 census)
[possibly Emily HARDY Dec qtr 1845 Cambridge (14/10) mother's maiden name WILDERSPIN]
Modified to add:
Horace Dillon NANKIVELL married Florence Kate MORRIS Dec qtr 1905 Ticehurst (2b/259)
William H NANKIVELL married Emilie HARDY Mar qtr 1866 Cambridge (3b/587)