Individual Details

1920 Census. Martinsville, Henry Co VA. Oct 29, 1920, Supplement, no household numbers
Bettie S. Thomas, head of household, age 61, Widow
Catherine, dau, age 28.

Married John Ross-Duggan and was living in Australia in 1927, according to her mother's obituary.
There is evidence of children.

Ancestry.com
Passenger List of the Franconia which arrived in New York, 21 Sep 1930. Sailed from Liverpool on 13 Sep 1930.
John Ross-Duggan, age 42, Company Director (Manufacturers Agent), British Citizen, born Wellington, New Zealand. His passport issued in Melbourne, Australia - his last permanent address.
Yancey Mary Reamey Ross-Duggan, 11 months old, Infant, British citizen,born in Melbourne
Catharine Sheffield Ross-Duggan, age 34, Housewife, Citizen of the USA, born in Martinsville, VA, passport issued by the Consulate in Melbourne
John Kimbell Ross-Duggan, age 5, child, Citizen of the USA, born in New York, NY

Passenger list of the Bremen which arrived in New York, 21 Apr 1938 from Southampton, England. Sailed on Apr 16th.
John Kimbell Ross-Duggan, age 49, Director, English Citizen, b. Wellington, New Zealand, Passport issued in London, last residence was London
Catharine S. Ross-Duggan, age 39, married, housewife, US Citizen, b. Martinsville, VA

Naturalization Record Indexes:
John Kimbell Ross-Duggan, 550 N. Shore Drive, Chicago, IL
Born, New Zealand, 25 Jun 1888
Date of Arrival in U.S., 1 Aug 1938, New York.
Date of Naturalization, 23 Jun 1942
Byford E. Troutt and Michael Smyth were witnesses.

Passenger list of the S.S.United States, departing Southampton, 7 Nov 1953, arriving New York, 12 Nov 1953.
John Ross-Duggan, P.O. Box 1991, Delray Bearch, FL, b. New Zealand. U.S. Passport

Found on Google Books
Dynamic Equivalence: The Living Language of Christian Worship, By Keith F. Pecklers
Notes from the book. [Much of the data seems somewhat inaccurate...]
2.3.1 "The Role of Colonel John Kimbell Ross-Duggan"
Born in Scotland 1888, at the age of two the family moved to Wellington, New Zealand and he lived there through his colleges years. In WW I, he joined the British Army and fought from Messines to Flanders. He had been interested in English liturgy since childhood but during his military service he came in contact with Jesuit liturgist, C. C. Martindale who was at Oxford, 1917-18.
After the War, Ross-Duggan came to the U.S., settling first with an uncle in San Francisco in 1919, then moving to New York. In 1942 he became a member of the English Liturgy Society, which changed its name to the Vernacular Society of Great Britain in 1945. The St. Jerome Society, a similar group, was formed in the U.S. and Ross-Duggan was asked to reorganize it with headquarters in Chicago. In 1949, he left his job as published of the Chicago-based periodical "Quick Frozen Foods" to devote all his time to the vernacular cause.
The article goes on to describe his travels, visits to the Vatican, Paris, etc.
Little is known about his personal life. He married Catherine Thomas of Hillsborough, NC in 1920, soon after his arrival in the States, but little is heard of her after that. [They married in NY in 1924. See above passenger list.] Apparently his European trips were made alone and no extant letters remain. Presumable they separated at some point as his obituary in 1967 notes that she survived him. He was close to two children - a daughter Remie who married Kenneth Fenske and lived in Rockaway, NY, and a son - Dr. John K. Ross-Duggan II of Long Beach, CA. Ross-Duggan spent a good deal of time either with his children in New York or California or in a hotel in Delray Beach, Florida. At times he worked for Westinghouse and American Steel Export and traveled in India, China, and Japan.
In 1937, Ross-Duggan returned to Hillsborough. He became a U.S. citizen in 1940 and moved to Chicago and was employed by Time, Inc. In 1944, he established Quick Frozen Foods.

I think the following may be a grandson, born 1950 - John Ross-Duggan ....
http://sailingteams.ussailing.org/Games/Past/2004Athens/John_Ross-Duggan.htm
John Ross-Duggan is described as a California golden boy. He began sailing at age 7; by 1977 while in his 3rd year of medical school, he won the Hobie 16 National Championship. Eight months later he broke his neck in an auto accident; he lost control of his car and hit a bridge. He was age 23. He did finish medical school and complete his residency. [He became a radiologist.] He returned to sailing and campaigning for the Paralympics. He made the debut as an exhibition sport in the 1996 Paralympics. Unfortunately his mother had died two weeks before the 1996 games and he didn't perform as well as he hoped. In 2004, his team qualified for the Paralympics and went on to win the Bronze.

Here is a newspaper article, prior to his accident.
Augusta Chronicle, Augusta, GA, Saturday, 18 Nov 1975, p.17
Californias Top Boat Event
Hilton Head Island, SC. California sailors continued to dominate the 1957 Hobie "16" national sailing championships Friday, with defending champion Dick Beauchamp of Corona Del Mar maintaining his lead.
Beauchamp goes into Saturday's championship race with five points. Behind him are fellow Californians Randy Hatfield, Long Beach, 10 1/2; Bob Seaman, Los Angeles, 12 3/4; John Ross Duggan, Newport Beach, 16; and Jerry King, Newport Beach, 20.

http://articles.dailypilot.com/2006-02-05/features/dpt-surfer05_1_john-ross-duggan-spinal-cord-accident
Outlook hopeful for injured surfer
February 05, 2006, By Lauren Vane
Experienced wave rider is recovering from a spinal cord injury that nearly paralyzed him.
Newport Beach local Jeremy Ross-Duggan has surfed all over the world. He's hit epic waves in Peru and tackled more than a few cliff dives. An athlete with a ferocious appetite for adventure, Jeremy Ross-Duggan admits he's done some crazy stuff in his 43 years.
With all the risk-taking, Ross-Duggan never dreamed he'd come so close to a life-threatening injury while surfing one-foot waves in the ocean where he grew up.
Jeremy Ross-Duggan and his close friend, Mark Schmidt, were surfing Jan. 29 near the Newport Pier when Jeremy Ross-Duggan mistakenly dove into shallow water and hit his head on a sandbar.
The accident instantly paralyzed him. Jeremy Ross-Duggan was drowning when Schmidt pulled him out of the water and onto the beach. Lifeguards and paramedics responded quickly and took Ross-Duggan by ambulance to nearby Hoag Memorial Hospital Presbyterian.
There, he learned he had suffered damage to his spinal cord.
"I've always been a nutty, diver-daredevil freak, so this was not even a risk," Jeremy Ross-Duggan said from his hospital bed Saturday.
For Jeremy Ross-Duggan and his family, the accident had a surreal element of familiarity.
Jeremy Ross-Duggan's brother, John Ross-Duggan, is quadriplegic. He broke his neck and was paralyzed in a car accident 28 years ago.
"I screamed at the doctor over the phone because I thought that they were joking me," said John Ross-Duggan, 50, of his reaction when an emergency room doctor told him of his brother's accident.
Minutes later, when John Ross-Duggan saw his brother in the hospital, he knew it was real.
"There he was -- couldn't move anything," John Ross-Duggan said.
Jeremy Ross-Duggan, John Ross-Duggan and their sister Robin Ross-Duggan are self-described "old Newport salt" -- locals who have traveled the globe, but always call Newport their home.
A police report taken at the accident scene originally identified Jeremy Ross-Duggan as being from Ventura.
Jeremy Ross-Duggan, now 43, attended Newport Elementary School and Newport Harbor High School, before moving to London to finish his high school education.
In London, he was adopted by his stepfather, and he took the name Jeremy Henderson, the name many of his friends know him by.
Jeremy and John Ross-Duggan grew up surfing together. They remember sneaking into Trestles and running across the railroad tracks when they were kids.

Birth	12 Oct 1892
Marriage	15 May 1924	New York City, New York - John Kimbell Ross-Duggan
Death	12 Jul 1983

Spouse	John Kimbell Ross-Duggan (1888 - 1967)
Child	Dr. John Kimbell Ross-Duggan II (1925 - 1977)
Child	Yancey Mary Reamy "Ramie" Ross-Duggan (1929 - )

Father	Lyne Starling Thomas (1859 - 1920)
Mother	Elizabeth Ann "Bettie" Sheffield (1859 - 1927)
Sibling	Mary Reamy Thomas (1885 - 1971)
Sibling	William Archer Thomas (1882 - 1959)