For background on how the map was made (and its flaws), see the relevant blog entry.
|Donnell||fairly numerous: Derry, W Tyrone. Usually occurs as O'Donnell, q.v.|
|Mac Domhnaill||Mac Donnell, Mac Donald: an-líonmhar ar fud na tíre in Ulaidh ach go h-áirithe. Tháinig dream amháin (Mac Donald) ó Albain mar ghallóglaigh agus shocraigh i nGleannta Aontroma. Bhí clanna eile i bhFear Manach agus i dTuathmhumhain. Ciallaíonn an t-ainm Domhnall "domhan-chumhachtach". IF.|
|MacDonnell||Very numerous: all areas, Ulster generally, Louth-Meath, Mayo etc. Ir. Mac Domhnaill, from first name Domhnall, "world-mighty". One group came from Scotland in 13 cent and became established in the Glens of Antrim; another sept of Thomond (Clare) were connected with the O'Briens. IF.|
DEDs where mcdonnell and a second surname are found together