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O'Leary Family History & Genealogy

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O'Leary Surname History

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  • O'Leary last name meaning & etymology
  • O'Leary spelling & pronunciation
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O'Leary Country of Origin, Nationality, & Ethnicity

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O'Leary Meaning & Etymology

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O'Leary Life Expectancy

According to our database of 532 people with the last name O'Leary that have a birth and death date listed:

Life Expectancy

63.7
years

O'Leary Family Tree

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Famous People named O'Leary

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Most Common O'Leary First Names

According to our database of 924 people with the last name O'Leary that have a first name listed, these are the most common first names:

  • John 10.5%
  • Timothy 4.7%
  • Daniel 4.3%
  • James 4.1%
  • Michael 3.9%
  • Patrick 3.7%
  • Thomas 3.6%
  • William 3.6%
  • Dennis 3.0%
  • Jeremiah 2.8%
  • Joseph 2.5%
  • Robert 2.2%
  • Arthur 2.1%
  • Cornelius 2.1%
  • Edward 1.7%
  • Charles 1.2%
  • Richard 1.2%
  • Mary 1.1%
  • Margaret 1.0%
  • Helen 0.9%
  • Francis 0.9%
  • Donald 0.8%
  • Eugene 0.8%
  • Paul 0.8%
  • Denis 0.8%
  • Dorothy 0.8%
  • Humphrey 0.6%
  • Bernard 0.6%
  • Cornelius b. 0.5%
  • Alice 0.5%
  • George 0.5%
  • David 0.5%
  • Stephen 0.4%
  • Elizabeth 0.4%
  • Frances 0.4%
  • Jerry 0.4%
  • Anne 0.3%
  • Howard 0.3%
  • Frank 0.3%
  • Nancy 0.3%
  • Albert 0.3%
  • Shirley 0.3%
  • Mildred 0.3%
  • Bartholomew 0.3%
  • Marie 0.3%
  • Russell 0.3%
  • Virginia 0.3%
  • Florence 0.2%
  • John c. 0.2%
  • Raymond 0.2%

O'Leary Pronunciation & Spelling Variations

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