O'Connor Family History & Genealogy

2,408 biographies and 37 photos with the O'Connor last name. Discover the family history, nationality, origin and common names of O'Connor family members.

O'Connor Last Name History & Origin

Updated Oct 12, 2021


We don't have any information on the history of the O'Connor name. Have information to share?

Name Origin

Anglicized form of Gaelic Ó Conchobhair ‘descendant of Conchobhar’, a personal name which is said to have begun as Cú Chobhair, from cú ‘hound’ (genitive con) + cobhar ‘desiring’, i.e. ‘hound of desire’. Present-day bearers of the surname claim descent from a 10th-century king of Connacht of this name. In Irish legend, Conchobhar was a king of Ulster who lived at around the time of Christ and who adopted the youthful Cú Chulainn.

Spellings & Pronunciations

O'Connor is also spelled O'Conner or without the apostrophe, Oconnor.

Nationality & Ethnicity

County Cork, Ireland

Famous People named O'Connor

Are there famous people from the O'Connor family? Share their story.

Early O'Connors

These are the earliest records we have of the O'Connor family.


O'Connor Family Tree

Discover the most common names, oldest records and life expectancy of people with the last name O'Connor.

Search O'Connor biographies:

Most Common First Names

  • John 12.4%
  • James 6.6%
  • Thomas 6.1%
  • Patrick 4.6%
  • William 4.1%
  • Michael 3.9%
  • Daniel 2.8%
  • Edward 2.2%
  • Joseph 1.9%
  • Timothy 1.8%
  • Charles 1.7%
  • Robert 1.7%
  • Mary 1.5%
  • Dennis 1.4%
  • George 1.1%
  • Francis 1.0%
  • Richard 0.9%
  • David 0.9%
  • Cornelius 0.8%
  • Jeremiah 0.7%

Sample of 5 O'Connor Biographies

O'Connor Death Records & Life Expectancy

The average age of a O'Connor family member is 57.0 years old according to our database of 2,164 people with the last name O'Connor that have a birth and death date listed.


Other O'Connor Records


Share memories about your O'Connor family

Leave comments and ask questions related to the O'Connor family.

Brian Hass commented on Sep 18, 2003
James O'Connor was born to Michael and Elizabeth (Betts) O'Connor in Limerick County, Ireland. He arrived in Canada as a boy and lived in Rawdon, Quebec for a number of years. In 1848, James married Bridget Jennings, who was born to Michael and Bridget (Donaghy) Jennings in Kerry County, Ireland. In 1854, the O'Connors moved to Wisconsin and spent their next nineteen years in the area of Elizabethtown/New Lisbon. The couple had eleven children: Patrick, Michael, Mary Ann, Joseph Corey, Elizabeth B., James William, Sarah Jane, Katherine Agnes, John J, Peter, and Francis. At some point, the couple also adopted a son named John McCabe. In 1872, James and Bridget brought their children; Patrick, Michael, and Mary; from New Lisbon, Wisconsin to Emmet Township, Dakota Territory. Each filed for a quarter of land in the township and then built small shacks on the land to make improvement to fulfill the Homestead Act. Patrick and Michael were reported to have farmed; while, Mary was reported to have cooked, washed, and sewed. When Patrick fell ill in 1874 and was no longer able to cultivate, James and Bridget brought the rest of the family down from New Lisbon, Wisconsin to Dakota Territory. Patrick O'Connor's burial was the earliest on record for St. Joseph Cemetery.
Bev Gillihan commented on Oct 01, 2004
SANDRA DAY O'CONNOR; born March 26, 1930, El Paso, Texas. Daughter of; Henry Alford Day and Ada Mae Wilkey; Henry Alford was the son of; Henry Clay Day and Alice Edith Hilton; Henry Clay was the son of; Hollis Day & Eliza L. Flanders; Eliza was the daughter of; Philip Flanders & Parlee Bradford; Philip was the son of; Simon Flanders & Hannah Leavitt; Simon was the son of; Asa Flanders & Mehitable Dow; Asa was the son of; Steven Flanders, 111 & Sarah Blaisdell; Steven 111 was the son of; Steven, 11 & Abigail Carter; Steven 11 was the son of; Steven 1 & Jane Sandusky Sandra Day O'Connor is the first woman Supreme Court Justice. She was appointed by President Ronald Reagan. She is a descendant of STEVEN FLANDERS and JANE SANDUSKY SHE MARRIED JOHN JAY O'CONNOR, 111 CHILDREN; SCOTT O'CONNOR - BRIAN O'CONNOR - JAY O'CONNOR -
Amanda Glasoon commented on May 20, 2007
My great Grandfather one Micheal O'Connor, was chosen by a name being pulled from a hat to select for himself land in Yonamite (spelling might be slightly off) Victoria Australia. It was his father one John O'Connor that came to Australia from Ireland that I wish to track. Ihave only an apporox year of 1820 (ish)
Susan Rees commented on Aug 05, 2009
I have hit a roadblock with our O'Connor line. If anyone has further info on this line I would love to hear from you. My name is Susan and my email is: [contact link] Here is what I know: Joseph L O'Connor (1883-1956)married Anna Louise (Lula, Lulu, Annie) Arthur (I have traced the Arthurs to England). Her parents were: Barbara Ziegler and Minor Arthur (family out of Lowville, New York) Joseph was my great grandfather and I have no idea who his parents were. Joseph and Lulu's children were: *Ferroll Ann O'Connor her second marriage was to a Treleven *Lawrence J O'Connor (Sept 20 1911-Aug 1986) married Margaret Irene King (I have traced the Kings back to England) Lawrence was an on board electrician in the Navy during WWII. He and Margaret were divorced by then, and he had custody of the four kids: Lawrence Jr, Patricia, Marion, and Gerald. My mother remembers that Lawrence placed her and siblings in a children's orphanage while he was in the service. She was about seven, and would go to the basement of the orphanage and play dress up with boxes of clothes and high heels she found there; the nuns seemed to "not notice" that she did this and would allow her the play time without a word to her about it. She remembers the day they heard on the radio that the war was over, she was so happy because she knew her daddy would be coming to get them. Lawrence was an electrician, and I remember as a child that he at one time worked for Petrie Electric. Lawrence liked to fish, and camp. He married a Helen and had two sons with her (I don't know her maiden name). Their sons were Glenn, and Neil. I remember camping trips with Grandpa, Helen, Glenn and Neil. Once when we were visiting him I made an apple pie (my first) I was 13. It came out of the oven golden brown, and ooozzing apple gravy. One bite, and I was horrified to learn it tasted very salty....Grandpa Lawrence laughed....I didn't know he had taken the sugar canister, and placed salt in it the last time we went camping to salt down the fish after we caught them. He felt bad that he left the salt in the sugar canister, and ruined my pie...we all laughed. *Frank E O'Connor (Mar 11 1913-Aug 14 1966) married Blanche Reich They lived in Lebanon, TN *Russell F O'Connor (Apr 09 1920-Aug 14 1995) married Rosemary Dunn they lived in North Fond du Lac, WI *Elizabeth Ann (Betty) O'Connor married Albert (Red) Holz My mother is the eldest daughter of Lawrence O'Connor....Patricia Louise. I found Joseph and Lulu (as my mother remember's her) in two census in Fond du Lac area, in one he is newly married and listed as a farmer, in the latter he is listed as a Tannery Foreman. My mother remembers stories of Joseph being brought to USA by his father Unknown O'Connor as a small child. Both census Joseph reported being born in Wisconsin, and that both his parents were born in Wisconsin...This is rather confusing. The O'Connor line is the only family I have hit a brick wall with. I have reached out to my mother's cousins (their father supposedly trace the O'Connor history), but no one has responded.... Thanks for letting share my O'Connor story.
Janice Lear commented on Feb 20, 2010
john was born on 12/2/1913 at kippen st.coatdyke,lanarkshire,scotland.he had an older brother edward(eddie)who moved to america,philladelphia,died 1953.john married jean(jane elliot)april 1941.they had two children francis(frank)and janice.john died 4/10/1982,jean died 20/12/1982,francis died 18/9/2008.john also had other sisters and brother.john lived in airdrie,lanarkshire,scotland most of his life.
Back to Top