American AcornsFrederick Carl Groos Jr.
1911–1998 · Male · died at 86
How to read this page
- Photos and clippings count items you can view here.
- Cited or transcribed records are counted separately.
- Story links lead to accounts about the person; “Mentioned in another story” marks a passing reference.
- Memorial links open Find a Grave.
- A “family recollection” label marks something a relative remembered, not a written record.
- A military-service label rates the record of that service, not the whole life.
Sex is as recorded in the family tree. Age at death is worked out from the dates shown and may be a range or an approximation. It is left out when a date is missing or is only a “before”, “after” or “between” date, when the research has found a date Unconfirmed, when the two dates conflict, or when they would mean an age over 110.
Overview
Service
World War II · Navy · 1942–1945 Confirmed
Navy service from June 1942 to November 1945 (VA death file); a Naval Reserve lieutenant in 1949, date of rank October 1, 1944 (Naval Reserve register). When he was first commissioned is not known. Very probably a brother of Gus Julius Groos Jr.
In the story: The twentieth century · Veterans of the family
Family
Parents
- Mother: Florence Alice Clarkson 1886–1964
Likely evidence: show why
Why: The 1920 census lists Florence Groos, 34, at San Antonio with her sons Clarkson 11, Frederick 8 and Gus 6. The father is not in that household; the brothers' surname, the name Frederick Carl Jr. and the register's grouping of the three point to Frederick Carl Groos. Likely rather than Confirmed until a birth record is read.
Records:
- 1920 U.S. census, San Antonio Ward 8, Bexar Co., Tex., Garden St., ED 97, sheet 15A: Florence Groos, 34, head; sons Clarkson 11, Frederick 8, Gus 6 (view at Ancestry.com)
- Register of Commissioned and Warrant Officers of the United States Naval Reserve, April 1949, p. 391: Groos, Gus J. Jr., LCDR (view at Internet Archive)
Review: assessed 10-20-2026; evidence: Index or transcription examined; Image examined.
- Father: Frederick Carl Groos
Likely evidence: show why
Why: The 1920 census lists Florence Groos, 34, at San Antonio with her sons Clarkson 11, Frederick 8 and Gus 6. The father is not in that household; the brothers' surname, the name Frederick Carl Jr. and the register's grouping of the three point to Frederick Carl Groos. Likely rather than Confirmed until a birth record is read.
Records:
- 1920 U.S. census, San Antonio Ward 8, Bexar Co., Tex., Garden St., ED 97, sheet 15A: Florence Groos, 34, head; sons Clarkson 11, Frederick 8, Gus 6 (view at Ancestry.com)
- Register of Commissioned and Warrant Officers of the United States Naval Reserve, April 1949, p. 391: Groos, Gus J. Jr., LCDR (view at Internet Archive)
Review: assessed 10-20-2026; evidence: Index or transcription examined; Image examined.
Life events
| Born | 17 Nov 1911, Texas, USA Confirmed evidence: show whyWhy: Birth date from the VA death file; born in Texas per the 1920 census. Records:
Review: assessed 10-20-2026; evidence: Index or transcription examined. |
|---|---|
| Died | 26 May 1998 Confirmed evidence: show whyWhy: VA BIRLS death file. Records:
Review: assessed 10-20-2026; evidence: Index or transcription examined. |
| Military service | U.S. Navy, 27 Jun 1942 to 8 Nov 1945 (VA death file); a Naval Reserve lieutenant, date of rank 1 Oct 1944, in the April 1949 register. When he was first commissioned is not known., 27 Jun 1942 Confirmed evidence: show whyWhy: The VA death file gives his Navy service dates. The April 1949 Naval Reserve register lists, on one page, GROOS CLARKSON (LCDR, born 1908, pay entry base date 18 Mar 1942), GROOS FREDERIC C JR (LT, born 1911, base date 29 Jul 1942) and GROOS GUS J JR (LCDR, born 1913). LT in the Naval Reserve register of 1949. Records:
Review: assessed 10-20-2026; evidence: Index or transcription examined; Image examined. |
Sources
Research sources
- 1920 U.S. census, San Antonio Ward 8, Bexar Co., Tex., Garden St., ED 97, sheet 15A: Florence Groos, 34, head; sons Clarkson 11, Frederick 8, Gus 6 Census view at Ancestry.com
- Register of Commissioned and Warrant Officers of the United States Naval Reserve, April 1949, p. 391: Groos, Gus J. Jr., LCDR Military view at Internet Archive
- U.S. Department of Veterans Affairs BIRLS Death File: Frederick Carl Groos, born 17 Nov 1911, died 26 May 1998; Navy, enlisted 27 Jun 1942, discharged 8 Nov 1945 Military view at Ancestry.com
Share a memory of Frederick Carl Groos Jr.: saved privately, not published (family members can sign in to send one).
Open an evidence label for the sources, assessment and review date. Unreviewed tree entries are Unconfirmed. How sure is each statement?