Ellen Casey1

#19980, (circa 1800 - before 24 December 1897)
Relationship1st cousin 3 times removed of Estelle Rose Roche
Father*Andrew Casey1 (s 1760 - )
Mother*Catharine O'Brien1 (c 1765 - )


Daniel O'Brien b. c 1785
Children 1.Catherine O'Brien+4 (1817 - 1898)
 2.Rev. Patrick O'Brien13 (c 1821 - 1873)
 3.John O'Brien+14 (c 1822 - b 1870)
 4.Andrew O'Brien+14 (c 1824 - b 1880)
 5.Mary D O'Brien+14 (c 1826 - 1899)
 6.Daniel O'Brien Jr.14 (c 1829 - )
 7.Rev. James O'Brien14 (c 1832 - )
Ellen Casey was also known as Nellie.2 
Her married name was O'Brien.3 
Birth*circa 1800She was born circa 1800 at IrelandG; (prob. in or near Mitchelstown, Co. Cork.)1 
Marriage*circa 1816She married Daniel O'Brien circa 1816 at IrelandG.3,4 
Baptism15 March 1829She, as Helen, sponsored the baptism of her nephew Andrew Casey.5 
circa 1833She and Daniel O'Brien migrated to Potosi, Washington Co., MissouriG, from Ireland circa 1833.6 
Baptism13 October 1833She sponsored the baptism of James Mundy on 13 October 1833 at St. James's Church, Potosi, Washington Co., MissouriG.7 
Baptism25 July 1835She, as Helen, sponsored the baptism of Sarah Casey on 25 July 1835 at St. Joachim's Church, Old Mines / Cadet, Union Twp., Washington Co., MissouriG.8 
Baptism10 June 1838She sponsored the baptism of Bridget Casey on 10 June 1838 at Washington Co., MissouriG.9 
1840She and Daniel O'Brien appeared on the census of 1840 at Meneabeton (now Breton) Twp., Washington Co., MissouriG; (neis. Munday, O'Mara, Casey and O'Hanlon.)10 
1840She and Daniel O'Brien appeared on the census of 1840 at Mine-a-Breton, Mineabeton (now Breton) Twp., Washington Co., MissouriG; (neis. Bernard Munday, John H Casey, George Casey, Felix Munday.)11 
20 November 1850She and Daniel O'Brien appeared on the census of 20 November 1850 at Breton Twp., Washington Co., MissouriG; (neis. Margaret Mundy, age 50, fam. 1170; John and Mary Pierce, fam. 1155.)3 
Death*before 24 December 1897She died before 24 December 1897.12 


  1. [S1813] Andrew Casey Probate File, St. Louis, Missouri (1895-1898), No. 21510 (microfilm C39583), Missouri State Archives, Jefferson City, Missouri (summary linked to Source below).
  2. [S1813] Andrew Casey Probate File No. 21510, Petition of George J Casey and Mary Whalen [sis], 23 Aug 1895. Names Nellie O'Brien, a deceased aunt of the deceased Andrew Casey.
  3. [S20] 1850 U.S. Federal Census. Daniel O'Bryan (65), miner, b. Ireland; Ellen (50), b. Ireland.
  4. [S1813] Andrew Casey Probate File No. 21510, names Ellen O’Brien, née Casey, deceased paternal aunt of Andrew Casey, and names her five children as Catherine (marr. Flynn), John, James, Andrew and Mary (marr. Mudd).
  5. [S2314] St. Joachim's Church Parish Registers (Old Mines, Missouri). Volume Baptemes 1827 - 1836, p. 33. Andrew Casey, son of "Morgan Caissé and Marguerite Harington," b. 9 Mar 1829, bapt. 15 Mar 1829 by Rev. Bouillier; sponsors John Casey and Helen Casey.
  6. [S2532] Rev. John Rothensteiner History of the Archdiocese of St. Louis, Two Volumes (St. Louis: Blackwell Wielandy Co., printers, 1928), II:98. "Daniel O'Brien, emigrated with his family in 1839, and settled in the town of Potosi, a short distance from St. Louis." But it had to have been before that as Daniel appears as a marriage witness in 1838.
  7. [S2313] St. James's Church Parish Registers (Potosi, Missouri). Book A-1, p. 16. James Munday [sic], son of Felix Munday and Catherine Callahan [sic], b. 14 Sep 1833, bapt. 13 Oct 1833 by J Bouillier; sponsors Patrick Carrigan and Helen Caysey. [sic]
  8. [S2314] St. Joachim's Registers. Book C, p. 133, img. 662/1170. Sarah Casey, dau. of Morgan Casey and Mary Camel [sic], b. 16 Jun 1835, bapt. 25 Jul 1835 by J Bouillier; sponsors Francis Casey and Hellen [sic] Casey.
  9. [S2313] St. James's Church (Potosi) Registers. B-153, img. 362/1060. Bridget Casey, dau. of Andrew Casey and Bridget Flinn [sic], b. 31 May 1838, bapt. 10 Jun 1838 by L Tucker; sponsors Michael Flinn and Ellen Casey.
  10. [S54] 1840 U.S. Federal Census. Daniel O'bryan (50-59); F (40-49) [Ellen]; M (20-29) [Patrick], m (15-19) [John), 2 m (10-14) [Andrew, Daniel], m (5-9) [James]; F (20-29) [Catherine], f (10-14) [Mary]; 2 free colored males (<10) and 1 free colored female (10-23).
  11. [S54] 1840 U.S. Federal Census. Daniel O'bryan [sic] (50-59); F (40-49) [Ellen]; m (20-29) [____], m (15-19) [John], 2 m (10-14) [Andrew, Daniel], m (5-9) [James); f (10-14) [Mary].
  12. [S1813] Andrew Casey Probate File No. 21510, Administrator's Statement, 24 Dec 1897. Names Ellen O'Brien, née Casey, a deceased paternal aunt of the deceased Andrew Casey.
  13. [S2311] Richard D Mudd, The Mudd Family of the United States (Ann Arbor, Michigan: Edward Brothers, 1951), p. 433.
  14. [S20] 1850 U.S. Federal Census.