Reverend Robert Grattan1
He was educated at Trinity College, Dublin University, Dublin, County Dublin, Ireland.1
Reverend Charles Grattan1
He lived at Enniskillen, County Fermanagh, Ireland.1 He was a school master.1
Sir Richard Grattan1
He held the office of Lord Mayor of Dublin in 1735.1
Reverend J. Tyrell1
Child of Reverend J. Tyrell
Elizabeth Tyrell1
Her married name became Grattan.
Children of Elizabeth Tyrell and James Grattan
Reverend William Grattan1
He was the Vicar at Edenderry, County Antrim, IrelandG.1
John Grattan1 
He graduated with a Doctor of Medicine (M.D.)1 He lived at Edenderry, County Antrim, Ireland.1
Children of John Grattan and Hannah Colley
- Margaret Grattan2 b. 1743, d. 1743
- William Grattan2 b. 1744, d. 1798
- Elizabeth Grattan2 b. 1746, d. 1808
- Thomas Grattan+2 b. 1749, d. 1801
- John Grattan2 b. 1752, d. 1752
- Arthur Grattan2 b. 1753, d. 1757
- Colley Grattan+2 b. 1754
- Richard Grattan2 b. 1754, d. 1754
- Sarah Grattan2 b. 1756, d. 1826
- Arthur Grattan+2 b. 1759, d. 1801