A dictionary of English and Welsh surnames: Dykehouse, Dicas = "at the dike-house, the house by the dike". John Dicas/Dicus of Hondbridge, Cheshire 1631,Wills at Chester, ii.65, 1688-9.Buried - Mr. Humphrey Dicas, Caterbury Cathedral, page 128, London (1884), 1,0.
Richard Dikus married 12 June 1692 at Holy Trinity Minorities, City of London, Hannah Carreway.
I do not have the surname, Dycus, in my genealogy, but I saw these families when I worked on my Dyke(s) family, some of whom are found in Cheshire, too.So far the DNA tests prove we are not related. They are distinctly two different families.