Sources disagree as to his parentage:
Father:  Thomas DAVIS
or
Father:  John DAVIS
Mother:  Johanne HEWLINGE

1.  John Camden Hotten, ed.  1874.  The Original Lists of Persons of Quality; Emigrants; Religious Exiles; Political Rebels; Serving Men Sold for a Term of Years; Apprentices; Children Stolen; Maidens Pressed; and Others Who Went from Great Britiain to the American Plantations, 1600-1700… from MSS Preserved in the state Paper Department of Her Majesty's Public Record Office, England. Chatto and Windus, London (reprinted 1974 and 1986 by Genealogical Publ. Co., Baltimore, MD; indexed on Broderbund CD-354; online at books.google.com and various other locations on the web):

The 1624/5 Muster List of Virginia is the first comprehensive census in British North America.  The list contains 1232 names, but does not include the names of women and children.  The enumeration was taken between January 20th and February 7th 1624/5 [meaning 1624 by the calendar at the time and 1625 by our calendar].  There are numerous other references (books and web sites) providing the lists along with explanations and discussion.
pp. 201-265	MUSTERS OF THE INHABITANTS IN VIRGINIA.
p. 254	Elizabeth Cittie... CAPT THOMAS DAVIS his MUSTER Capt THOMAS DAVIS aged 40 in the John and Francis 1623 Thomas HEWES aged 40 in the John and Francis 1623 [one intervening household] PERCIVALL IBOTTSON his MUSTER PERCIVALL IBOTTSON aged 24 in the Neptune 1618 ELZABETH IBOTTSON aged 23 in the Flyinge Hart 1621 JOHN DAVIS aged 24 in the John and Francis 1623 Servants WILLIAM GREENE aged 28 in the Hopewill 1623 ROBART LOCKE aged 18 in the Warwicke 1621

2.  Martha W. McCartney.  2007.  Virginia Immigrants and Adventurers, 1607-1635:  A Biographical Dictionary.  Genealogical Publ. Co., Baltimore, MD (excerpts online at books.google.com):

p. 246	JOHN DAVIS (DAVIES) John Davies (Davis) came to Virginia on the John and Francis in 1623 and on February 16, 1624, was living in Elizabeth City
p. 247	(18).  In early 1625 he was identified as a 24-year-old servant in Percivall Ibbotson's household, east of Blunt Point (22) (CBE, 44, 66).

John is not listed as a servant, he's listed before the servants (see above).  "Servant," in this case, means indentured.

3.  Michael F. Doran.  1987.  Atlas of County Boundary Changes in Virginia, 1634-1895.  Iberian Publ. Co., Athens, GA:

In 1617, on the Southern Neck (a.k.a., Virginia Peninsula) of Virginia Colony, Elizabeth City was formed as one of four "incorporations and parishes" in Virginia Colony.  These were the first political subdivisions of the colony.  In 1634, Charles River Shire was split off from Elizabeth City.  In 1642/3, Charles River Shire was re-named York County, which it remains to this day.

4.  Anon.  January 1902.  "Children of John Miller and His Second Wife, Sallie Henderson."  The West Virginia Historical Magazine Quarterly (Charleston, WVa) 2(1):48-53 (online at books.google.com):

p. 49	...James Henderson Miller, the only son of John Miller by his second wife...
p. 50	...Henderson Miller was married to Harriet E. Craig...
p. 51	...Henderson and Harriet Craig Miller were the parents of six children... Mrs. Miller's maternal line, also early settlers in Central Kentucky, goes back through the Jelfs, Davises, Crigtlers, Aylors, Fieldings and others to the early years of Virginia.  The first of the Davis famly in Virginia was John Davis, son of John and Johanna Hewlinge Davis, of Gloucestershire, England, who settled on Queene's Creek, York county, in 1623; his inventory was recorded here September 14th, 1646.  After Bacon's Rebellion John Davis' grandson, John Davis, settled in Westmoreland county, where he married in 1691 Susannah Day, widow of Solomon Day, as shown by an old deed in my possission, in which they convey to George Brent 200 acres of land.  Their son, Thomas Davis, who owned a large plantation in Stafford county, married Sarah
p. 52	Fielding, daughter of Edward Fielding, one of the wealthiest planters in Northumberland county.  Their son William married Catharine Carter, daughter of James Carter, November 17th, 1755.  Thomas and Sarah Fielding Davis were the great-great-great-grandparents of Finnetta Lyon Miller.  Space forbids me from mentioning the generations that come between.  The name Fielding has been used as a given name in all the generations of the Davis family since 1720...

5.  Oh, drat, where did I get this?

p. -	-
p. 476	Inventory of the estate of John Davis of Queen's Creek taken 4th Sept. 1646 — value 3066 b. tob.
p. -	-

6.  LDS Wiki: Marston Parish, Virginia (online at FamilySearch.org):  Marston Parish, York Co., VA, was not formed until 1654; parish records have been lost.

7.  Anon.  January 1904.  "Bounds of Marston Parish, York County."  The William and Mary College Quarterly 12(3): 174-175 (online at jstor.org):

p. 174	November 20, 1654; att an Assembly held at James Cittie: From the Head of the North side of Queen's Creek as high as to the head of Skimeno Creek is made a distinct parish named Marston, ordered by this Grand Assembly.  (Hening's Statutes, I., 388.)
p. 175	...This Cort doth find... that the bounds of Marston Parish granted in 1654 were thus: From the river up the North syde of Queene's Creek to the head thereof including the Clay Banck to Jamestowne path and soe to Rickahock path, soe to the head of Skimenoe and from thence to the River...

.  Email from descendant, Rev. Deborah DAVIS.

.  Messages posted to the Davis Heritage Group (online at Yahoo Groups).

.  Public Member Trees (online at Ancestry.com).