Harry Clark Cooper 1906–1974
Catalog ID p.605 · Cite this page: njcoopers.com/p/605/
Harry Clark Cooper was born on 27 Dec 1906 in Newton, Sussex Co., NJ, the son of Clark Caleb Cooper and Laura M. (Ackerson) Cooper. He married twice: Ella M. Crowell and Dorothy Myrtle Hornbeck (1940). He died on 31 May 1974. One child is recorded.
Facts
| Event | Date | Place / detail | Certainty | Sources |
|---|---|---|---|---|
| birth | 27 Dec 1906 | Newton, Sussex Co., NJ | certain | F.188, D.357, D.356, D.352 |
| residence | May 1910 | Green Township, Sussex Co., New Jersey (Greenville Road) | certain | D.357 |
| residence | 20 Jan 1920 | Green Township, Sussex Co., New Jersey | certain | D.352 |
| residence | 22 Apr 1950 | Frankford Township, Sussex Co., New Jersey (Mattison Schoolhouse Road) | certain | D.356 |
| occupation | 22 Apr 1950 | driver, Tractor-trailer | certain | D.356 |
| death | 31 May 1974 | certain | G.218 |
Family
Parents
- Father Clark Caleb Cooper 1888–1943
- Mother Laura M. (Ackerson) Cooper 1886–1918
Spouses
- Ella M. (Crowell) Cooper 1906–1992
- Dorothy Myrtle (Hornbeck) Cooper 1911–1993married 1940F.189
Siblings
- Robert A Cooper 1917–1938
- Dorothy (Cooper) Dowling 1925–2009 half
- Charles G Cooper 1926–2006
Children
- Ruth Evelyn (Cooper) Hovencamp 1928–2003
Family tree
Solid lines and outlines: certain. Dashed: probable or weaker. Open the full tree (four generations)
In the documents
Every published document that names Harry Clark Cooper, in date order, with what that document itself records.
| Date | Document | Role | What it records |
|---|---|---|---|
| 1910-05 | D.357 federal census 1910 US Federal Census, Population - Green Township, Sussex County, New Jersey; E.D. 171, sheet [?]B (stamped 4697); enumerated 18-19 May 1910 by Laura[?] M. Wa… |
grandchild as "Harry" |
residence: May 1910, Green Township, Sussex Co., New Jersey (Greenville Road) |
| 1920 | D.352 federal census 1920 US Federal Census (NARA T625), Green Township, Sussex County, New Jersey, Supervisor's District 6, Enumeration District 184, sheet 8B; enumerated 20 Januar… |
child as "Cooper, Harry C." |
residence: 20 Jan 1920, Green Township, Sussex Co., New Jersey |
| 22 Apr 1950 | D.356 federal census 1950 US Census of Population and Housing, Form P1 - Frankford Township, Sussex County, New Jersey; E.D. 19-6A, sheet 14A; started 22 April 1950 by Edna A. Lawso… |
lodger as "Cooper, Harry" |
residence: 22 Apr 1950, Frankford Township, Sussex Co., New Jersey (Mattison Schoolhouse Road) occupation: 22 Apr 1950, driver, Tractor-trailer |
3 further documents not published (they may name living people).
Still unknown, and where we have looked
- Burial not yet found.
1 search recorded:
findagrave 2026-10-04 · Harry Cooper, b. 1906 +/- 1, d. 1974 +/- 1, all locations (9 results).
Searched for: Harry Cooper, b. 1906 +/- 1, d. 1974 +/- 1, all locations (9 results).Result: No memorial for him on the page (Harry Cooper of Paramus 1907-1975 is another man). His burial is in the family plot per [G.218].
Other searches recorded
ancestry all 2026-10-19 · HIS MARRIAGE TO Ella M. (Crowell) Cooper ELLA M. CROWELL - the gap the sweep's worklist carried at 'no search recorded', and the only...
build_missing_records.py matches a search row to a gap by the words in the QUERY, so a marriage gap stays flagged unsearched unless the query says so.)
Ancestry 'New Jersey, U.S., Marriage Index, 1901-2016' (coll. 61253), SIGNED IN - the State Archives' own typescript bride and groom indexes, and the collection that produced [C.155] and [C.159] in the two preceding days. Two directions, plus a coverage test:
(a) BRIDE SIDE: ?name=Ella_Crowell&count=50 - 64 rows, BOTH PAGES READ, the whole of the engine's answer for her name. Full write-up on Ella M. (Crowell) Cooper.
(b) GROOM SIDE: ?name=Harry_Cooper&count=50 - 267 rows over 6 pages; pages 1 and 2 read (100 rows), which is where the exact-match band lives: the true Harry Cooper rows run out at about row 64, after which the set drifts to any H-middle-initial Cooper (Herbert H, Sidney H, Sheryl H...) and to other surnames (Harry J Keuper). Pages 3-6 were NOT read and the result below is stated for the exact-match band only, not for all 267.
(c) COVERAGE, checked before either null was written: the collection's Browse this collection panel, Index Type = Bride Index, year range list and surname-range list.ancestry all 2026-10-19 · THE SAME TWO GAPS BY COMPLETE-COUNTY LIST, the step the row below named — run the same hour so the recommendation and the result sit...
?name=_Cooper&count=50&residence=_sussex-new+jersey-usa_2837&residence_x=1-0-0_1-0&birth=1906&birth_x=1-0-0 in coll. 6224 (1930) and coll. 2442 (1940).
A surname-only county list is indifferent to given-name manglings, which is exactly the risk here: [D.352] writes him ‘Harry C’, not Harry Clark.name= at all, bounded on residence and birth year — which is the only form a wrong GIVEN name and a wrong SURNAME cannot both defeat.
THE NAMELESS SEARCH WAS THEN TRIED ON WARREN CO. AND IS RECORDED AS ATTEMPTED, NOT AS A NULL. ?count=50&birth=1906_new+jersey-usa&birth_x=1-0-0&residence=_warren-new+jersey-usa_3036&residence_x=1-0-0_1-0 (coll. 6224) returns 2,181 rows across 44 pages — every Warren County resident born in New Jersey about 1906. That is a browse, not a search, and this catalog's own rule is that an untightened result set which cannot be read is not a search at all. Page 1 was read and nothing was concluded from it.
AND THAT IS THE LIMIT OF THE NAMELESS SEARCH, WORTH WRITING DOWN: it worked on Knowlton Twp (43 rows) and on Lackawanna Co. (a ~24-row New-Jersey-born band) because those sets were small. A populous county across a whole birth year is too big for it. ⇒ To use it here the band must be narrowed further — by TOWNSHIP rather than county (Green and Andover Twps have their own ids), or by adding a relation or an occupation.
ancestry all 2026-10-19 · HIS 1930 AND 1940 CENSUSES, both at ‘no search recorded’. Same shape in each collection:...
?name=Harry_Cooper&name_x=1_1&birth=1906_new+jersey-usa&birth_x=1-0-0&count=50 — both name halves exact, birth year exact, birthplace left non-exact so an enumerator who wrote something vague could not hide him (the lesson [D.860] taught the same day). 1930 = coll. 6224: 44 rows, all read. 1940 = coll. 2442: 47 rows, all read.
A FOURTH SEARCH IS RECORDED AS NOT A SEARCH: the 1940 run was first made with &residence=_sussex-new+jersey-usa_2837&residence_x=1-0-0_1-0 added and returned zero. Exact name + exact year + a residence bound is the over-tightening this catalog has documented; the zero proves nothing and is not treated as a null.genealogybank 2026-10-04 · Not run separately this pass.
newspapers com 2026-10-04 · SIGNED IN. (a) "Harry Cooper" OR "Harry C. Cooper", New Jersey, 31 May - 15 Jul 1974 (40 matches - Jersey City, Bridgeton, Paterson,...
ancestry all 2026-10-04 · Harry Cooper, b. 1906 +/- 1 Sussex Co., NJ, d. 1974 (3 results).
familysearch tree 2026-10-04 · Harry Cooper, b. 1906-1907, father Clark (20 results).
ancestry all 2026-10-06 · Ancestry 'U.S., Social Security Applications and Claims Index, 1936-2007' (coll. 60901): Harry Clark Cooper, birth 1906 +/-1 (name...
Disproved claims
These sources link this person in a way the evidence has since disproved. The source is still transcribed as written.
- G.217: listed as deceased ("Harry C. Cooper"); refuted.
Documents
- D.352 1920 US Federal Census (NARA T625), Green Township, Sussex County, New Jersey, Supervisor's District 6, Enumeration District 184, sheet 8B; enumerated 20 January 1920 by [R?]. M. Dennis
- D.356 1950 US Census of Population and Housing, Form P1 - Frankford Township, Sussex County, New Jersey; E.D. 19-6A, sheet 14A; started 22 April 1950 by Edna A. Lawson.
- D.357 1910 US Federal Census, Population - Green Township, Sussex County, New Jersey; E.D. 171, sheet [?]B (stamped 4697); enumerated 18-19 May 1910 by Laura[?] M. Washer.
- D.668 1930 U.S. census, Andover Township, Sussex Co., New Jersey, ED 19-2, sheet 1A, lines 11-17 (dwelling 4, family 4) — NARA T626