This Rosdellig group is all new to me. I did get some info from my DNA cousin in Ireland. I have pieced together two bits of information and have come up with this:
Matthew Griffith
b. 1740
Generation 1: Matthew’s family
1.1 William b. 1757?
1.2 Henry
1.3 Matthew
1.4 One daughter married a Mr. Egger
Generation 2: William’s family
2.1 John married Mary Kelly
2.2 Samuel married Margaret Little
2.3 Edward 1770-1845 married Ann Little
2.4 Ann married William Leech
2.5 Esther married Mr. Hesse
2.6 Martha married John Griffith – cousins?
2.7 Jane married Henry Eager
Generation 3: Edward’s family
3.1 George married Mary Leech
3.2 Elizabeth married William Simmons b. 1810
Generation 4: George’s family
4.1 Edward Thomas II
4.2 George Simmons
4.3 Samuel Joseph - Australia
4.4 Anna Maria
4.5 Elizabeth Jane
4.6 John William - Rosdillig
4.7 James Henry b. 1866 married Ann Kearns
4.8 Robert Richard - Australia
4.9 Mary Margaret
4.10 Enoch Little
4.11 Lydia Florence married Mr. Thomson - Canada
Generation 5: James Henry’s family
5.1 George Edward d.19
5.2 Elizabeth married Gerald Healy
5.3 Mary Margaret d.40
5.4 James Joseph married Eileen Murphy
5.5 Robert Richard married Josie Crampton
5.6 Samuel Matthew b. 1903 married Catherine Whelan
Generation 6: Samuel Matthew’s family
6.1 Annette Mary married Maurice O’ Donoghue
6.2 James Joseph married Ann Corr
6.3 John Anthony married Margaret Lawlor
6.4 Peter Francis married Mary Murphy
6.5 Joanna Rita married Liam Jennings
6.6 Elizabeth Bridget married Frank Donnelly
6.7 Mary Catherine
Generation 7: John Anthony’s family
7.1 Caroline Catherine married Michael Doyle
7.2 Fiona Margaret married Vaughn Kirghran
7.3 John Samuel
7.4 Justin Edward
Notice the Leach connections. I have a few leach contacts that I plan to run this by. Hopefully this helps. Also - have you checked here:
http://www.irishgenealogy.ie/en/Let me know how you make out.