John GRAHAM: b. 1729; d.17 Apr. 1777 in Great Georges Street, Dublin. Son of Rt. Hon. William Graham and Mary, dau. of George Granville, 1st Baron Landsdowne. Married: Dorothy Sophia, dau.of Richard Gorges. Children: james. William, Elizabeth Gertrude, Mary. MP for Drogheda 1749-60; 1761-68. Coroner for Drogheda Town 1752, Sheriff of Co. Meath 1753. Residence Plattin, Co. Meath
His father:Rt. Hon. William GRAHAM: son of John Graham & Charity [?] of Newtown of Drogheda. Married 14 Mar 1729/30 MAry (d.1735) 2nd dau. of George Granville, 1st Baron Landsdowne. Children: John (above), Granville, ?William. Residence: Platin Hall
William's father: John Graham (b. before 1659; d. 1717), son of Robert Graham of Co. Armagh and Mary Bell. Married 24th Apt. 1860 Charity, dau of [?] Newtown of Drogheda. Children: Robert, m. Cicily, dau of Christopher Cusack; Rt. Hon William (above); Thomas; ?ELizabeth, m. Rev. Rowland SIngleton; Sarah, m. 18 Nov 1714 Rt. Hon. SIr Thomas Taylor, 2nd Bt.; Charoty, m. Richard Pennefather; Christian, m. Mathew Forde; ?Anne, m. Joshua McGeough of Drumsilk. Alderman of Drogheda 1713.
The source of the above information is: Edith Mary Johnston-Liik,
History of the Irish Parliament 1692-1800. Vol 4, 2002
There is a further link to Richard Gorges, but you may have all this information already. I'm nor too sure of the two marriages to "Charity [?] of Newtown of Drogheda". It seems a bit coincidental.
You will find numerous references to the Grahams as Drogheda aldermen in Rev T. Gogarty,
Council Book of the Corporation of Drogheda, Drogheda 1915, reprinted 1988. There is an index of sorts to the book on my website
www.jbhall.freeservers.com . Scroll down the front page and you will see the links.
Hope that helps a bit.
Brendan