I have just spotted your post, I cannot help with your grandfathers siblings but can go back a couple of generations.
Edward Concannon b 1892 Glasgow Parents Wm John Concannon & Mary Ann McNelly m 1891 Glasgow.
William John Concannon b1864 Glasgow, Parents Edward Concannon & Esther Davidson m 1861 Glasgow
Edward Concannon b1826 East Indies, Parents John Concannon(soldier) & Hannah Jones
Esther Davidson b 1831 Wick, Caithness, Parents Wm Davidson & Janet Smith m1826 Watten, Caithness
Janet Smith b1803 Auchentoft Watten Parents Wm Smith & Esther Georgeson
I am descended from Wm Smith & Esther Georgeson.
If you would like more details send me a Private Message with your email address.
Kris
