My name is John McGann (42 years old) and although I live in London in the UK I was born and brought up in Longford, Ireland where I lived until I emigrated in 1987.
My father was the youngest of 8 children to John and Bridget McGann who would both have been born in the years around 1900. They lived on a small farm in Derrylough/Corlea area of Kenagh, Co. Longford.
Now, not many McGann families live in Co Longford so I guess my ancestors are probably related to you in some way or another.
Please let me know if you have had any success in tracing your ancestors since you posted your message and I look forward to hearing from you.