Robert Harrington's name is the last on the list of proprietors made out 1642-44. He then owned a homestall, “given him by Thomas Hastings.” This gift renders it probable that he was a kinsman of Dea. Hastings. He was adm. freeman, May 27, 1663. ... Robert Harrington took the oath of fidelity, 1652. He was selectman 15 years, 1679-1700. 
Robert Harrington is last on the list of proprietors in Watertown (1642-44). He then owned a homestall given to him by Thomas Hastings. The gift renders it probable that he was a kinsman of Thomas Hastings."
I’ve studied the genealogy of the Hastings family and find no Robert Harrington listed. At this time in Watertown, there was a huge influx of new immigrants and it was ruled by the town that no land or homestall in the original town lots was to be sold to the newcomers. This resulted in a lot of hanky-panky. Original settlers were “giving” land and homestalls to the newcomers. Quiet deals were made. This may be how Robert Harrington came by his “gift” from Hastings.
However the land was acquired, there is an unanswered question -- how did Robert Harrington, now aged 26, and with no prior documented history of family or work, come by the resources to acquire property?
Maybe this is part of the answer. Robert C. Anderson, in the Great Migration series, reports that on 4 March 1656/7, "Thomas Hastings of Watertowne ... yeoman" confirmed the approximately 1643 verbal sale to "Robert Harrington of the same place, servant," of six acres of Township Land [MLR 2:13-14]. If Thomas Hastings paid the passage for Robert Harrington in exchange for indentured servitude, maybe he also sold him the six acres at the end of the term.
Robert Harrington of Watertown married October 1, 1649, Susanna, daughter of John George. They had 13 children.
Robert HARRINGTON, married 1 Oct 1648, Susanna, dau. of John George. 
On October 10, 1648, he married Susanna George, daughter of John George.
On 10 Oct 1648 Susanna married Robert Harrington in Watertown, MA. He was born abt 1616 in England and died on 17 May 1707 in Watertown, MA., with burial at Arlington St. Cemetery, Watertown. Occupation: Miller.
"Robert Herington & Susan George Maryed the first of october" , in Watertown, Massachusetts
Susanna George was born ca 1631 in Wrentham, Suffolk. Susanna was baptized in Wrentham, Suffolk, on 4 Dec 1631. 
They lived in Watertown, Massachusetts, and had 13 children: Susanna, John, Robert, George, Daniel, Joseph, Benjamin, Mary, Thomas, Samuel, Edward, Sarah, and David.
John, of Lexington, born August 24, 1651, in Watertown, who was the father of twelve children;  He died Waltham August 17, 1741, age 90.  He married Hannah Winter Nov 17, 1681. Hannah was born in Cambridge Farms April 10, 1665. Cambridge Farms was that part of Cambridge which later became Lexington. She died July 17, 1741 in that part of Watertown that became Waltham, age 78.  John Harrington is mentioned in the will of Hannah Winter’s father, as guardian of Hannah’s sister Mary and receiver of their shares of John Winter’s estate. John Winter still lived at Cambridge Farms when he died. John and Hannah Harrington had Lydia Harrington, born March 2, 1690, 4th child of 12. (last 2 were twins)..Lydia married John Cutter, son of William and Rebecca (Rolfe) Cutter.  12 children
David, b. June 1, 1673, in Watertown, d. young.
1652-1707 Town leadership
Harrington took the oath of fidelity in 1652, was a freeman May 27, 1663. And also became a town officer as well as mill-owner. He was a selectman selectman, 1697, 1681-83, 85, and from 1691 until his death. 
Robert’s wife, Susanna, died on July 6, 1694, in Watertown
Will of Robert Harrington III of Watertown
Provisions of the Will of Robert Harrington of Watertown. 
Item 1: To my eldest son John: 1/2 part of the Jeremiah Dummer purchase, 1/3 part of the Samuel Saltonstall meadow purchase.
Item2: To son Daniel: A farm of 105 acres purchased from Lawrence Waters; also 10 acres of the Saltonstall meadow.
Item 3. To son Benjamin: The 55 acre farm where his dwelling now stands; also 8 acres in Sudbury purchased from Roger and Benjamin Wellington; also 4 acres of the Lawrence Waters purchase.
Item 4: To son Samuel: 125 acres of farmland where his dwelling now standeth, being part of the Jeremiah Dummer purchaase, also the meadow therein, being known as Brown's meadow.
Item 5: To son Thomas: The 58 acre farm purchased of David Church; 1/3 of the Saltonstall meadow; 20 acres of the Lawrence Waters meadow.
Item 6: To son Edward: My homestead of six acres with one mansion house, 2 barns, mill house, and cyder works, and orchard lands; also one plowland on Watertown Little Plain, 18 acres; also 12 acres of upland meadow purchased of Nathaniel Treadway; also 5 acres purchased of Richard Norcross; also 8 acres purchased of Captain John .Sherman; also "all moveable estate within and without."
Item 7: To my eldest daughter Susanna Beers, £40.
Item 8: To Mary Bemis, ;£40.
Item 9: To Sarah Winship, £40.
Item 10. To my grandcnild Joseph, son of my son Joseph, deceased; about six acres of meadow purchased of Phebe Barnard, which with what I have given him by deed of gift is his full share
Item11: To my daughter-in-iaw, Joanna Ward, late wife of my son Joseph, 5 shillings
Item12: To Benjamin, 5 acres of the Phebe Barnard meadow; also 12 acres of the Samuel Hide purchase
Executors: sons Daniel Harrington and Edward Harrington.
/s/ Robert Harrington.
Death and Burial
He died May 11, 1707  in Watertown, Middlesex, Massachusetts. He is buried in Plot 98 of the Old Burying Place, Watertown, Middlesex County, Massachusetts.  You can see a picture of his gravestone at FindAGrave.
Here Lyes Buried ye Body of Robert HARRINGTON Aged 91 Years Died May ye 11th 1707
Here Lyeth Buried ye Body of Susanna HERRINGTON ye Wife of Robert HERRINGTON, Aged 63 Years Dec'd July ye 6 1694"
Robert Harrington’s inventory (in will) mentions 16 lots of land (642.5 acres) appraised at 717 lbs. He had purchased the Oldham Farm for 90 lbs (250 acres.) Some of his descendants still lived there at the time of Bond’s book writing, ca. 1859.
Buried in The Old Burying Ground (Arlington Street Cemetery) Watertown MA:
↑ Bond’s Watertown Genealogies:29, cited by D. Pane-Joyce.
↑ Charles Henry Pope, "The Pioneers of Massachusetts" 1900, p. 214
↑ Middlesex Probate: 10,459. Dated 1 January 1707. Filed 19 March 1709.
↑Watertown Records Comprising the Third Book of Town Proceedings and the Second Book of Births Marriages and Deaths to the end of 1737 also Plans and Register of Burials in Arlington Street Burying Ground Prepared for Publication by the Historical Society (Watertown, Mass Press of Fred G. Barker 1900)(Free e-book. Available at Google Play). Second Book of Births, Marriages and Deaths, p. 34. Also noted in Bond, Henry, M.D., Genealogies of the Families and Descendants of the Early Settlers of Watertown, Massachusetts, Including Waltham and Weston(Boston: Little, Brown & Company 1855) )(Free e-book. Available at Google Play).
↑ Find A Grave (http://www.findagrave.com) Maintained by: Bill Boyington; Originally Created by: AllanG; Record added: Aug 17, 2007; Find A Grave Memorial# 20992084
Due to the many discrepancies I was finding on the web regarding the Harrington family, I contacted the Historical Society of Watertown and hired their genealogist to research the Harrington family for me. The following "story" is her final report, based on the references she listed at the bottom. She has also included some information on the Reverend John Younges family since Younges married the widow of Robert Harrington I. 
Source: PW 3: Weis, Frederick Lewis, Th.D., Early Generations of the Family of Robert Harrington of Watertown, Massachusetts 1634 and Some of His Descendants (Worcester, Massachusetts: Privately Printed 1958)(Available at Ancestry.com:http://search.ancestry.com/search/db.aspx?dbid=11918)
Source: PW 4: Bate, Kerry William, "The English Origins of the Cambridge, Massachusetts Errington Family", The New England Historical and Genealogical Register, Vol.132 (January, 1978), p.44
Source: PW 16 - Watertown Records Comprising the Third Book of Town Proceedings and the Second Book of Births Marriages and Deaths to the end of 1737 also Plans and Register of Burials in Arlington Street Burying Ground Prepared for Publication by the Historical Society (Watertown, Mass Press of Fred G. Barker 1900)(Free e-book. Available at Google Play)
It may be possible to confirm family relationships with Robert by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
Since Robert Harrington is not one of the 240 Gateway Ancestors documented by Douglas Richardson in Magna Carta Ancestry, he is not within the scope of the Magna Carta Project. To have him included in the project, primary sources would be needed to support parent/child relationships until his trail connects to someone who is documented by Richardson (in either Magna Carta Ancestry or Royal Ancestry - the latter being preferred as it was published in 2013 & MCA was published in 2011).
It's been almost two years since someone suggested merging this profile into Harrington-100. I see there are no details about your Harrington-- all empty data fields, nothing in the narrative. Shall we go ahead and merge him away or do you have other plans for him?
I changed the quotation symbols to the recommended blockquote ones, and I am not sure I have done it all correctly (sometimes it was a bit difficult to tell which words were quotes) Apologies if I messed it up.
Yes, I think the parents should be disconnected (and their linked IDs retained in the biography with explanation, under "Uncertain Origin" heading)
Robert Harrington is one of my mother's ancestors. While I spend most of my time on my father's Maryland ancestors, I'm interested in researching Robert Harrington's ancestors to see how much is fact and how much is myth.