(1) John of England = unknown mistress
(2) Richard FitzRoy = Rohese de Dover
(3) Lorette de Dover = William Marmion
(4) John Marmion = Isabel
(5) John Marmion = Maud Furnival
(6) Avice Marmion = John Grey
(7) Maud Grey = Thomas Harcourt
(8) Thomas Harcourt = Jane Franceys
(9) Richard Harcourt = Edith St. Clair
(10) Alice Harcourt = William Besilles
(11) Elizabeth Besilles = Richard Fettiplace
(12) Anne Fettiplace = Edward Purefoy
(13) Mary Purefoy = Thomas Thorne
(14) Susannah Thorne = Roger Dudley
(15) Thomas Dudley, Governor of Massachusetts = Dorothy Yorke
(16) Patience Dudley = Daniel Denison
(17) Elizabeth Denison = John Rogers
(18) Patience Rogers = Benjamin Marston
(19) Benjamin Marston = Elizabeth Winslow
(20) Patience Marston = Elkanah Watson
(21) Marston Watson = Lucy Lee
(22) Horace Howard Watson = Thirza Hobart
(23) Agnes Lee Watson = Charles Nichols
(24) Charles Nichols = Martha Dix
(25) Charles Nichols = Julia Skelton
(26) Natalie Nichols = Ulysses John "Tony" Lupien
(27) Carol Lupien = John Cena
(28) John Felix Anthony Cena
 
Sources for each generation:
1-15: GBR says Thomas Dudley is descended from King John and lists families in descent.
https://www.americanancestors.org/staticcontent/articles?searchby=author&subquery=Gary%20Boyd%20Roberts&id=636
Full descent taken from here
http://archiver.rootsweb.ancestry.com/th/read/PLUMMER/1998-10/0907514488
16-18: Memoirs of the Marstons of Salem: With a Brief Genealogy of Some of their Descendants (John Lee Watson, 1873), p. 4-5
https://books.google.com/books?id=KQ4wAAAAYAAJ
19: Watson, p. 16
20-22: Watson, p. 42-43
23: Massachusetts death record for Agnes Lee Watson (lists parents and spouse)
24: Massachusetts marriage record for Charles Nichols and Martha (Dix) Heald
25: Massachusetts marriage record for Charles Nichols and Julia Skelton
26: New Hampshire death record for Natalie Lupien (lists parents); Wikipedia page for Tony Lupien
27-28: Wikipedia page for John Cena