See also

Louisa FITZPATRICK's parents: John FITZPATRICK (c. 1719-1758) and Evelyn LEVESON-GOWER (1725-1763)
Louisa FITZPATRICK's siblings: John FITZPATRICK (1745-1818), Richard FITZPATRICK (1748-1813) and Mary FITZPATRICK (c. 1750-1778)

Family of William PETTY and Louisa FITZPATRICK

Husband:
William PETTY (1737-1805)
Wife:
Louisa FITZPATRICK (c. 1755-1789)
Children:
Henry PETTY-FITZMAURICE (1780-1863)
Louise FITZMAURICE ( - )
Marriage:
19 Jul 1779
Bloomsbury, London EC¹
Address: St George's Church

Husband: William PETTY

Name:
William PETTY
Sex:
Male
Father:
-
Mother:
-
Birth:
2 May 1737
Dublin, Co. Dublin, Ireland¹
Death:
7 May 1805 (age 68)
Piccadilly, London W¹
Address: Berkeley Square

Wife: Louisa FITZPATRICK

Name:
Louisa FITZPATRICK
Sex:
Female
Father:
John FITZPATRICK (c. 1719-1758)
Mother:
Evelyn LEVESON-GOWER (1725-1763)
Birth:
c. 1755
Death:
17 Aug 1789 (age 33-34)
Piccadilly, London W¹
Address: Berkeley Square

Child 1: Henry PETTY-FITZMAURICE

Name:
Henry PETTY-FITZMAURICE
Sex:
Male
Spouse:
Louisa Emma FOX-STRANGWAYS (c. 1785-1851)
Birth:
2 Jul 1780
Mayfair, London W²
Address: Lansdowne House
Title:
3rd Marquess of Lansdowne
Death:
31 Jan 1863 (age 82)
Derry Hill, Wilts²
Address: Bowood House

Child 2: Louise FITZMAURICE

Name:
Louise FITZMAURICE
Sex:
Female

Sources

1.: thepeerage.com.

2.: wikipedia.org.