Are you talking of the Richard Cheney born in 1616 who married a Mary Charity Wood in 1649 in London, London, England? In my notes I have him listed as Richard the 4th as his father was Richard the III (married an Anne Ellinor June 3, 1612 in Woolwich, London, England), Richard the III's father was Richard the II [or junior](married an Elizabeth Ofley Feb 6 1590/91 in St. Mary Woolnot, London, England). Richard Jr.'s father was Richard Sr. who married a Mary (no last name given).
Richard Cheney Sr. was born 1524, died ? Richard Cheney Jr. was born 1566, died 1625 Richard Cheney III was born Jan 25 1594/95, died 1633 Richard IV was born 1616, died March 6 1684/85
Btw. My notes have Richard Cheney Sr.'s father as a John Cheney (b. 1490 - d. 1545) who married a Mary Gyles in 1521 in Kent, England