Thomas Griffitts was Mayor of Philadelphia on three occasions.

Griffitts was born in Cork

Cork (city)

Cork is the second largest city in the Republic of Ireland and the island of Ireland's third most populous city. It is the principal city and administrative centre of County Cork and the largest city in the province of Munster. Cork has a population of 119,418, while the addition of the suburban...

, Ireland

Ireland

Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

 and emigrated to Philadelphia via Jamaica. He was a provincial councillor from 1733 to 1742. He was Mayor of Philadelphia in 1729-1731, 1733–1734, and 1737-1738. He also served as Judge of the Supreme Court from 1739 to 1743.http://patriot.lib.byu.edu/cdm4/document.php?CISOROOT=/FH3&CISOPTR=36683&REC=10

Griffitts married Mary Norris, daughter of Isaac Norris

Isaac Norris

Isaac Norris was a merchant and prominent figure in provincial Pennsylvania, including mayor of Philadelphia in 1724.He was born in London, England, but his father, Thomas, moved to Jamaica when Isaac was seven years old...

. He was a Quaker. He died in Philadelphia.