Main Blackett Tree

Mary O'Brien 3rd Countess of OrkneyAge: 69 years17211790

Name
Mary O'Brien 3rd Countess of Orkney
Surname
O'Brien
Given names
Mary
Name suffix
3rd Countess of Orkney
Birth about 1721

MarriageMurrough O'Brien 1st Marquess of ThomondView this family
1753 (Age 32 years)

Birth of a daughter
#1
Mary O'Brien
September 4, 1755 (Age 34 years)

Marriage of a childThomas FitzMauriceMary O'BrienView this family
December 21, 1777 (Age 56 years)

Death May 10, 1790 (Age 69 years)