Mary D O'Brien1,2

#19985, (circa 1826 - 18 April 1899)
Relationship2nd cousin 2 times removed of Estelle Rose Roche
Father*Daniel O'Brien1 (c 1785 - )
Mother*Ellen Casey1 (c 1800 - b 1897)


Judge Henry T Mudd b. 1816, d. 1890
Children 1.Daniel H Mudd13 (c 1857 - )
 2.James Theodore Mudd13 (c 1859 - )
 3.Patrick S Mudd14 (c 1860 - )
 4.John P Mudd13 (c 1865 - )
 5.Andrew A Mudd13 (c 1867 - )
 6.William A Mudd13 (c 1870 - )
Her married name was Mudd.3 
Birth*circa 1826She was born circa 1826 at IrelandG.1 
circa 1833She accompanied Daniel O'Brien and Ellen Casey circa 1833 from Ireland to Potosi, Breton Twp., Washington Co., MissouriG.4 
1840She appeared on the census of 1840 in the household of Daniel O'Brien and Ellen Casey at Meneabeton (now Breton) Twp., Washington Co., MissouriG; (neis. Munday, O'Mara, Casey and O'Hanlon.)5 
Baptism28 March 1840She sponsored the baptism of Andrew F Casey Jr. on 28 March 1840 at St. James Church, Potosi, Breton Twp., Washington Co., MissouriG.6 
Baptism11 August 1844She sponsored the baptism of Daniel Flynn on 11 August 1844.7 
20 November 1850She appeared on the census of 20 November 1850 in the household of Daniel O'Brien and Ellen Casey at Breton Twp., Washington Co., MissouriG, age 24, b. Ireland; (neis. Margaret Mundy, age 50, fam. 1170; John and Mary Pierce, fam. 1155.)8 
Marriage*12 June 1856She married Judge Henry T Mudd, son of Theodore Mudd and Dorothy Ellen Dyer, on 12 June 1856 at St. John's Church, St. Louis, Missouri.3 
24 August 1860She and Judge Henry T Mudd appeared on the census of 24 August 1860 at Millwood Twp., Lincoln Co., MissouriG; nei. H P (50) and Carrie (45) Mudd, fam. 1800.9 
17 August 1870She and Judge Henry T Mudd appeared on the census of 17 August 1870 at Millwood Twp., Lincoln Co., MissouriG.10 
8 June 1880She and Judge Henry T Mudd appeared on the census of 8 June 1880 at Millwood, Lincoln Co., MissouriG.11 
Death*18 April 1899She died on 18 April 1899 at Lincoln Co., MissouriG.12 
Burial*circa 20 April 1899She was buried circa 20 April 1899 at St. Alphonsus Cemetery, Millwood, Lincoln Co., MissouriG.12 


  1. [S20] 1850 U.S. Federal Census.
  2. [S2311] Richard D Mudd, The Mudd Family of the United States (Ann Arbor, Michigan: Edward Brothers, 1951), p. 433.
  3. [S271] Missouri Marriage Records, 1805-2002, Microfilm images, online, St. Louis, Record images, 1856, img. 77/212, p. 63. Henry T Mudd and Mary O'Brien, marr. St. Louis 12 Jun 1856, by Patk. O'Brien pastor of St. John's.
  4. [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.
  5. [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).
  6. [S2313] St. James's Church Parish Registers (Potosi, Missouri). Book B, no. 219, img. 369/1060. Andrew Casey, son of Andrew Casey Sr., and Brigit Flinn, b. 13 Mar 1840, bapt. 28 Mar 1840 by.
  7. [S2314] St. Joachim's Church Parish Registers (Old Mines, Missouri). Register 3, p. 48, img. 796/1170. Daniel Flynn, son of Laurence Flinn and Catherine O'Brien, b. 10 Jul 1844,bapt. 11 Aug 1844 by L Tucker; sponsors Eugene Flinn and Mary O'Brien.
  8. [S20] 1850 U.S. Federal Census. Daniel O'Bryan (65), miner, b. Ireland; Ellen (50), b. Ireland.
  9. [S19] 1860 U.S. Federal Census. H T Mudd (50), b. MD, physician; Mary (32), b. Ireland.
  10. [S18] 1870 U.S. Federal Census. Henry T (52), b. MD, merchant, real estate value $16,000, personal estate $16,800; Mary, b. Ireland, b. Ireland.
  11. [S17] 1880 U.S. Federal Census. Henry T (64), b. and parents b. MD, farmer and merchant; Mary (53), b. and parents b. Ireland, keeping house.
  12. [S1628], online, family plot with 3 old standing grave markers and 2 large monuments: (marker) Elizabeth E, wife of Henry T Mudd, b. 8 Feb 1816, d. 20 Aug 1855; (marker) Thomas E, son of H T & Elizabeth Mudd, b. 23 Jan 18 1840, d. 23 Jan 1853; (marker) George A Mudd, b. 17 May 1838, d. 6 Mar 1875; (large modern monument) Henry T Mudd, b. Charles Co. MD 23 Sep 1816, d. 23 Sep 1890, age 78y 6m 8d; (large monument) Mrs. Mary Mudd, b. 1826, Kilworth County Ireland [sic, actually Kilworth, Co. Cork. There is a village of Kilworth about 15 km south of Mitchelstown and 6 km north of Fermoy], d. 18 Apr 1899. Saint Alphonsus Cemetery, Millwood, Lincoln Co. MO. Memorials 110797201, 110797206, 110797209, 110797212 and 110797220, all created by and photos added by Jerry Prouhet. [This is an excellent presentation by Jerry Prouhet]
  13. [S18] 1870 U.S. Federal Census.
  14. [S19] 1860 U.S. Federal Census.