Thanks Rob for spurring me to put this information together.

How Did They Get Here and When Did They Arrive?

A few references...
My Brief Ancestor Names Page http://www.damnedcomputer.com/genealogy/nbriefancestornames.html
Northrup Northrop Genealogy book https://archive.org/stream/northrupnorthrop00nort#page/n5/mode/2up
-Note: has some errors and omissions
Eaton & Davenport Company http://feindholloway.com/bradley/doc/Davenport-Eaton.html
Withthrop Fleet  https://en.wikipedia.org/wiki/Winthrop_Fleet

Joseph Northrup b.1623 Kent, Yorkshire, England 
Emigration: 26 JUL 1637 Boston, Suffolk Co., MA
Residence: APR 1638 New Haven, New Haven Co., CT
Christening: 9 JAN 1642 First Church, Milford, New Haven Co., CT
Death: 11 SEP 1669 in Milford, New Haven Co.
Burial: Milford, New Haven Co., CT
Joseph Northrup, immigrant from England, perhaps Yorkshire. He was one of Eaton & Davenport's Company "of good character and fortune", who came from England 1637 in the ship "Hector & Martha". They landed in Boston, July 26, 1637 and settled in New Haven in April 1638. They were mostly from Yorkshire, Hertfordshire, and Kent. Members of this Company, and of Sir Richard Saltonstall's Company, removed to and settled Milford, Conn., and the "free planters of the town" where enrolled Nov. 30, 1639; but Joseph, not then being in church following, his name (with others) appears in the list immediately after the free planters. The surname Northrup was spelled as here given in the earliest records and inscriptions on tombstones----RUP, sometimes RUPP, and occasionally ROOP and more often ROP, although this last termination was not common at an early peroid. Joseph 1, his son Joseph 2 and his sons, James, Joseph, Moses, and most of their descendants, spelled the name Northrup. Northrop, however, was the common form in England. January 9, 1642, Joseph united with The First Church in Milford. He married Mary, daughter of Francis Norton who came to Milford from Wethersfield with the Rev. Peter Prudden and his party. Joseph died Sept. 11, 1669. His will was dated Sept. 1, 1669. It mentions of his children only Joseph, Samuel, Jeremiah, and John. Codicil to his will says, "My mother shell have a living in my house as long as she lives"---perhaps meaning his wife's mother, Mrs. Norton. His wife survived him, and made her will Jan. 24, 1683; mention Joseph, Samuel, Jeremiah (omits John, who probably was dead), Zophar, Daniel, William, and Mary--- the latter two being in their minority---also her mother Norton, Inventory of her estate dated Feb. 28, 1683.

The Northrup-Northrop Genealogy By A. Judd Northrup It was at the height of the tryannous reign of Charles the First, and the persecutions of Laud, the prelate of the English Church, who sought to exterminate Puritanism at the dissolution of the Parliament of 1629, that multitudes of Protestant non-conformists emigrated to America, seeking refuge in a country where they might have freedom of conscience and worship. The great migration began in 1630, and continued until about 1640. Among these seekers for religious freedom were Eaton and Davenport's company, "of good characters and fortunes." JOSEPH NORTHRUP, it is said on good authority, was a member of that company. They came from England in the ship "Hector and Martha," landing at Boston, July 26, 1637. The emigrants of that period were, in great part, men of the professional and middle classes, some of them of large landed estate. The bulk, however, were God-fearing farmers from Lincolnshire and Eastern counties. Eaton and Davenport's company were mostly from Yorkshire, Hertfordshire and Kent. It cannot now be determined from which county Joseph came--perhaps from Yorkshire; and if of Sir Richard Saltonstall's company, as it sometimes has been asserted, this is highly probable. Sir Richard Saltonstall's company had spent time at Wethersfield, Conn., having come there from Watertown, Mass., but later came to New Haven. The Eaton and Davenport company, meanwhile, had sailed down the coast from Boston, in search of a good harbor, until they came to New Haven, where they found the object of their search, and remained at New Haven about a year. In 1639, members from both companies formed the settlement of Milford, Conn. The Hertfordshire and Yorkshire emigrants seem to have tended to Milford, while others went to Guilford. Rev. Peter Prudden, of the Saltonstall company, whose wife was from Egton, Yorkshire, went to Milford. He was much beloved, and many Yorkshiremen followed him. On Nov. 29, 1639, the little company who had come to Milford from New Haven signed a document which laid the foundation for their government of the "plantation." It read: "Those persons whose names are hereunto written are allowed to be Free Planters, having, for the present, the liberty to act in the choice of public officers, for the carrying on the public affairs in this plantation." Church membership was a condition of admission as a "Free Planter." Forty-four persons signed as such. Joseph Northrup, who was one of the company, was not then a church member, but with nine others was permitted to sign under the names of the full-fledged Free Planters. At a General Court (town meeting), held Nov. 24, 1640, the place was named "Milford." On Jan. 9, 1642, Joseph joined the First Church of Milford (organized at New Haven, Aug. 22, 1639, just before they came to Milford), and thereby became of right a member of that privileged class. He was married to [Frances] Mary Norton about 1647. He died Sept. 11, 1669, thirty years after the settlement of Milford. The "Second Presbyterian Society" was formed in 1741-42, and was begun by members seceding from the First Church. They announced themselves to be Presbyterians according to the faith and practice of the Church of Scotland, and agreed on Nov. 30, 1741, to set up a separate society, in case the heads of thirty families would unite for that purpose. Accordingly, on the first Sunday in December, 1741, a public meeting was held for them at the house of George Clark, Jr. On the last Tuesday in January, 1742, they qualified themselves before the County Court, according to the "English Act of Toleration," by taking the oath and subscribing to the declaration by said Act, for worshiping God in a way separate from that by law established in the Colony. Among the signers was Josiah Northrup, son of Zophar, the fifth son of Joseph, the immigrant. The Governor and company granted a Patent to Milford, dated May 22, 1713. The names of the Northrups, attached to the Patent (the original of which is in the handwriting of Jonathan Law, Esq., afterward Governor of Connecticut) in the order in which they signed, are as follows: John, son of Jeremiah; Zophar and Jeremiah, sons of Joseph; Jeremiah, Jr.; Joseph, James and Moses, sons of Joseph, Jr.; Amos and Joel, sons of Samuel; Daniel and William, sons of the first Joseph. The Colonists of Milford lived at a period when there was danger from hostile Indians. Their settlement was made shortly after the Pequot War. Although they purchased their lands of the tribes in possession, and sought their friendship, yet they soon saw indications of hostility, and as a protection built a palisade of logs enclosing a mile square, within which they had their dwellings. The Indians became hostile in 1645-6, and guards were hept day and night. They went to church, carrying their rifles with them. The Indians were again troublesome in 1653. In 1700 there was much danger. It was a time of general alarm throughout the country for four or five years. The colonists of New Haven and Milford had all along purchased from the Indians the lands they settled upon, and in every way treated the Indians kindly and fairly, but the hostility of these sons of the forest was awakened by their fears of the growing numbers and power of the whites, and the dawning consciousness that sooner or later they would inevitably be driven from their ancient homes. If they could have written history, it would go far to justify their hostility.
 
Son of
Joseph Northrup b: ABT 1603 Derby, Derbyshire, England 
Katherine Birdsey b: ABT 1603 in Derbyshire, England
m1 Mary Norton b: 1627 in Wethersfield, Hartford Co., CT m. 9 JAN 1642 in First Church, Milford, New Haven Co., CT 

One of the earliest immigrants with Mary born 1627.  Francis Sr in New Hampshire in 1631 & probably earlier. .
Mary Norton, b 1627 in Wethersfield, came to Milford from Wethersfield with Rev. Peter Prudden and party [abt 1638].    

Father in law, Captain Francis Norton -- ironically, he is said to have drowned in the local harbor.  FRANCIS NORTON [Sr], of Piscataqua, 1631, was an agent for Capt. John Mason there until 1641, when he removed to Charleston. He was a man of education and old-time culture; was admitted freeman, 1642; captain of militia; representative eleven years. An early writer said: "A man of a bold and cheerful spirit, being well disciplined and an able man." . Francis Norton [Jr] was a sea captain, lived at Wethersfield in 1639, and went to New Haven, Branford and Milford, being drowned at Milford, February 3, 1667.  I'm not sure how far Rob Billings & family are from Piscataqua River/Strawberry Banke, but since it borders Maine, they may be pretty close.): The first known European to explore and write about the area was Martin Pring in 1603. The village was settled by English immigrants in 1630 and named Piscataqua, after the Abenaki name for the river. Then the village was called Strawberry Banke, after the many wild strawberries growing beside the Piscataqua River, a tidal estuary with a swift current.

At the town's incorporation in 1653, it was named Portsmouth in honor of the colony's founder, John Mason. He had been captain of the port of Portsmouth, England, in the county of Hampshire, for which New Hampshire is named. In 1679, Portsmouth became the colonial capital. FRANCIS NORTON [Sr] worked for Captain John Mason, but became a scapegoat in the mismanagement of this very early settlement Capt. John Mason: The Founder of New Hampshire Including His ..., Volume 17 By John Ward Dean, Charles Wesley Tuttle

Francis Norton Sr was m. to Mary Houghton who may be related distantly to Kathryn Hepburn.

 [This may or may not be Katherine line] Immigrant, 1636  "John Birdseye, the progenitor of the Connecticut family, came from Reading, in Berkshire, England, in 1636. He was first at New Haven. He had two sons, Joseph and John, and one daughter. John the father was first at New Haven." --Evelyn Beran

My perspective
It's good to have some historical perspective.

We sometime credit one or another ancestor with being the first, with sharing our views of freedom and opportunity, along with the assumption that ALL who migrated were here for religious freedom.