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E-Mail D.R. "Doc" Young - Genealogy Research & Assistance - 27 Jul 2011


Grennan & Minnick - O'Neil & Kane - Grennan & Conroy - Grennan & O'Neil - Grennan & Kelly - Grennan & Rubis

Robert Eugene Day & Barbara Ellen Boyer


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1st - 2nd - 3rd  - 4th Generation


Marriages | Grennan's Census | O'Neill's Census | Time Line | Death Cert - Obits | Livingston Co. Cemeteries | Illinois State Death Index


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The Story Begins.......the following is an excerpt from the Livingston County Historical of 1888 Portrait and Biographical Album, published in 1888 by Chapman Brothers out of Chicago - ref: Bernard Grennan and Family


John Grennan, b. abt. 1800, Co. Kings, Ireland, d. same place unknown when, m. Mary Minnick, b. Co. Kings, Ireland, came to America after John's death with her children, living a considerable time in IL, spending her last years in NY State, when died is unknown.

Mary nee Minnick Grennan, mother of 7 sons, and 2 daughters: Mathew (died in Ireland), James, Rosa, Bernard, Mike, Peter, John, Joseph and Mary.  All but Mathew came to America

Bernard Grennan 4th oldest, reared in Ireland, came to America living in NY State, then the City, building docks for 5-6 years, then moving to Will Co., IL for a few months, before moving to Morris, Grundy Co., IL, working for 3 years at the pumping station of the Rock Island Railroad.

In 1864, Bernard moved to Livingston Co., and for 7 years farmed rented land in Nevada Township.  For 3 years he resided on 80 acres he purchased in Odell Township before selling and purchasing 160 acres, his present homestead, until his death 4th of October, 1887.

The Journey now is to connect John Grennan & son Bernard Grennan (1821), Joseph Grennan (1851 NY) to Michael Grennan (1820) & son Joseph W. Grennan (1856 NJ) - could Michael be the Mike above, brother to Bernard, son of Mary nee Minnick & John Grennan ?


Marriages | Census Grennan's | Census O'Neill's | Time Line | Obits | Odell Cemetery | Illinois State Death Index

Research Notes


The following information, is based on census & other document findings, names, dates & places as indexed/spelled

1st Generation

John Grennan, b. abt. 1780, Co. Kings, Ireland, m. Mary Minnick, b. abt. 1782, Co. Kings, Ireland, d. Unknown, NY

Children: unknown order of birth

Mathew (died in Ireland)
James - est. birth 1816
Rosa - est. birth 1818
Bernard Grennan, b. 20 Sep 1821, Co. Kings, Ireland, d. 4 Oct 1887, Odell, Livingston Co., IL, m. Catherine Conroy
Michael Grennan, est. birth 1823, only 1 census, b. abt. 1820, d. 8 Apr 1878, Odell, IL...m. Emily Conroy, older sister of Catherine Conroy
Peter - est. birth 1825
John Grennan, est. birth 1827 - b. abt. 1821-24, Ireland, m. Catharine ?, b. abt. 1824, Ireland - 1850 - 1860
Joseph Grennan, est. birth 1829 - b. abt. 1827, Ireland - 1850
Mary - est. birth 1831


Notes: Children by 1850 census, may not be living with mother Mary, unknown when Mary nee Minnick Grennan arrived in America


Mary 1850 - 1860


2nd Generation

Bernard Grennan, b. 20 Sep 1821, Co. Kings, Ireland, d. 4 Oct 1887, Odell, Livingston Co., IL, m. May 1851, NY, Catherine Conroy, b. Jul 1831, Co. Kings, Ireland


Joseph W. Grennan, b. abt. 1852, NY - m. Anna O'Neil
John in Sunbury
Stephen W. Grennan, b. 28 Mar 1857, Morris, IL, d. 10 May 1931, Chicago, IL - m. 3 Aug 1887, Cook Co. IL, Anna L. Gook, b. abt. 1863.  Note: Marriage & Death Cert. on file
Ellen at home
Mary Grennan, m. Bernard Kelley - lives in Union Township
Bernard in Sunbury m. Mary Grennan ??
Daniel in Livingston Co., Odell?, Dwight? Nevada?
Michael in Livingston Co., Odell?, Dwight? Nevada?

Notes: Catherine Conroy parents - Stephen Conroy & Ellen Fox - born & died Co. Kings, Ireland


1850 - 1860 - 1870 - 1880



Michael Grennan, b. abt. 1820, Ireland, d. 8 Apr 1878, Odell, Livingston Co., IL, m. Emily nee Conroy, b. bet. 1825, older sister of Catherine Conroy (1831), their parents Stephen Conroy, mother Ellen Fox, which parents never immigrated, Catherine was a little girl when her parents died, and she came to America with her older sister.  Conroy & Fox's from County Kings, Ireland.




John Grennan, b. abt. 1853, NY

Joseph Grennan, b. abt. 1856, NJ, m. Sarah M. O'Neil

Stephen Grennan, b. abt. 1858, IL

Ellen Grennan, b. abt. 1860, IL

Michael Grennan, b. abt. 1863, IL, may have been born abt. 1867, IL see 1900 census


1870 - 1880 - 1900



John O'Neil, b. abt. 1831, Ireland, m. Mary Kane, b. abt. 1830, Ireland




Thomas O'Neil, b. abt. 1853, Louisiana see 1860 census

John O'Neil, b. abt. 1856, IL

Henry O'Neil, b. abt. 1858, IL

Sarah O'Neil, b. abt. 1860, IL m. Joseph Grennan, 4 Feb 1880, Odell, Livingston Co., IL

Anna O'Neil, b. abt. 1862, IL m. Joseph W. Grennan, 17 Mar 1885, Odell, Livingston Co., IL

Bridget O'Neil, b. abt. 1864, IL

Jane O'Neil, b. abt. 1865, IL

Mary O'Neil, b. abt. 1866, IL

William O'Neil, b. abt. 1868, IL

Alice O'Neil, b. abt. 1870, IL Alice Grennan?


Note: Mary Kane's mother is Sarah Kane

1860 - 1870 - 1880


3rd Generation

Joseph W. Grennan, b. abt. 1852, NY - parents Bernard Grennan & Catherine Conroy

m. Anna O'Neil - parents John O'Neil & Mary Kane




Florence Grennan, b. 6 Feb 1887, IL, d. Jun 1975
John Lester Grennan, b. 12 Oct 1888, Odell, Livingston Co., IL
Thomas Grennan, b. 6 Aug 1890, Odell, Livingston Co., IL, d. 29 Jan 1972
Mary Grennan, b. abt. Apr 1893, IL (aka Maude) m. J. Earl McMahon of Aurora, IL ???
Joseph Bernard Grennan, b. 1 Jul 1894, Odell, Livingston Co., IL
Ellen Grace Grennan, b. 4 Oct 1896, IL
William Leo Grennan, b. 10 Jul 1898, IL (or Leo William)
Irene Camilla Grennan, b. 5 Feb 1900, IL




Joseph Grennan, b. 18 Nov 1855, NJ, - parents Michael Grennan & Emily Conroy

m. Sarah M. O'Neil - parents John O'Neil & Mary Kane


Children:  To Be Updated as of 1 Apr 2011 - Not a April Fools trick


John Francis Grennan, 22 Apr 1881, IL per birth on file [2]

Joseph Leo Grennan, b. 20 Jun 1882, Joliet, Will Co., IL, d. 10 Dec 1918, Streator, IL
Henry Grennan  16, b. Nov 1883, IL
James Grennan  14, b. Sep 1885, IL
Gertrude Grennan  11, b. Aug 1888, IL
Wm Grennan  9, b. May 1891, IL
Edward Grennan  7, b. Oct 1892, IL
Magdelen Grennan  5, b.  Sep 1894, IL
Mildred Grennan  2, b. Aug 1897, IL


Frank is John Francis, Joseph, Henry, James, Gertrude, William, Edmund or Edward??, Magdalene and Mildred see obits




4th Generation


Thomas Grennan, m. 22 Apr 1937, Ottawa, LaSalle Co., IL, Helen Rubis, 8 May 1905, IL, d. 16 Jun 1978, IL




Helen Ann Grennan, b. 1 Sep 1937, m. Harold Edmund Johnston

Thomas Lawrence Grennan, b.20 Dec 1938

Mary Patricia Grennan, b. 16 Sep 1940, m. John Poruba

Leo Andrew Grennan, b. 30 Dec 1942, m. Cherie A Williams


Notes: Birth/Baptism of Thomas Grennan, 8 Aug 1890


1900 - 1910 - WWI - 1920 - 1930 - WWII




Joseph W. Grennan & Anna O'Neil, married 17 Mar 1885, Odell, Livingston Co., IL - Marriage Cert. Page 1 & Page 2

Joseph W. (Nevada, Livingston Co., IL) 33, b. abt. 1852, NY
Annie O'Neil (Highland, Grundy Co. IL) 24, b. abt. 1861

Joseph's parents: Bernard Grennan & Catherine Conroy
Joseph born NY

Anna's parents: John O'Neil & Mary Kane
Anna born Eagle, Saline Co., IL

Witness to marriage:  Bernard Grennan & Bridget O'Neil


Joseph Grennan & Sarah M. O'Neil, married 4 Feb 1880, Odell, Livingston Co., IL - Marriage Cert. Page 1 & Page 2

Joseph of (Nevada, Livingston Co., IL) age 24, b. abt. 1856 & Sarah M. of (Highland, Grundy Co. IL) age 21, b. abt. 1859

Joseph's parents: Michael Grennan & Emily Conroy
Joseph born Jersey City, NJ

Sarah's parents: John O'Neil & Mary Kane
Sarah born Eagle, Saline Co., IL

Witness to marriage:  Stephen Grennan & Maggie Morrissey



Research Notes:


Mary nee Minnick's 9 children as written

Mathew, James (1817), Rosa (1819), Bernard (1821), Mike (1822), Peter (1824), John (1826), Joseph (1828) and Mary (1830)


I found in 1900, Emily Grennan, b. May 1827, Ireland, living in Dwight, Livingston Co., IL, with son Michael, b. Nov 1867, from the 1880 census, about a 3-4 discrepancy in birth years between 1880 & 1900 censuses.


I began looking in 1860, since Joseph W. is b. abt. 1856, should appear in the 1860 census, however where, NY, NJ or IL ??


And going from 1880 & 1900 census, also the WWI draft records, we can place Grennan, Grenan, Grennen, Grenen, Grenner's in Grundy Co., Livingston Co., LaSalle Co. and townships/post offices of Saratoga/Morris, Dwight, Nevada, Odell & Osage


World War I Draft Registration Cards, 1917-1918

Name:  Henry Aloyisus Grennan
County:  LaSalle
State:  Illinois
Birth Date:  25 Nov 1883
Race:  White
FHL Roll Number:  1614204
DraftBoard:  3
Station Agent, Wabash RR
12 Sep 1918

Nearest Relative: Mrs. Catherine Aloyisus  Grennan
603 S Vermillion St. Streator, IL

U.S. World War II Draft Registration Cards, 1942

Name:  Henry A Grennan
Birth Date:  25 Nov 1883
Birth Place:  Nevada, Illinois
Residence:  Streator, Illinois

Living at: 303 West Stanton St. Streator, IL

Name: Henry Grennan - possibly Henry Arthur or Henry Aloysius per the WWI & WWII military draft/registrations
Home in 1900:  Nevada, Livingston, Illinois
Age:  16
Birth Date:  Nov 1883
Birthplace:  Illinois
Relationship to head-of-house:  Son
Father's name:  Joseph J Grennan
Father's Birthplace:  Illinois
Mother's name:  Sarah Grennan
Mother's Birthplace:  Illinois
Marital Status:  Single

Household Members:
Joseph J Grennan, 42, b. Apr 1838, NY, parents Ireland (1838 maybe a typo)
*Sarah nee
O'Neil Grennan*, 39, b. Jun 1860, IL, parents Ireland
Joseph Grennan, 18, b. 1882, IL
Henry Grennan, 16, b. Nov 1883, IL
James Grennan, 14
Gertrude Grennan, 11
Wm Grennan, 9
Edward Grennan, 7
Magdelen Grennan, 5
Mildred Grennan, 2

Joseph J. Grennan's occupation: Coal Dealer - the 30th dwelling/house in order of visitation, no numerical or street name.
















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Footnote: This page & others represents hours/days/years of research...Thank you for allowing D.R. "Doc" Young to have Researched part of your Family Tree


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