A check of the Index to Griffith’s Valuation, conducted between 1848–1864, listed the landowners below in Tawnaglass, Kilconduff Parish, County Mayo during that period. Notice the spelling difference between Tawnaglass and the newer version of Tavnaglass.
- Creadan, John
- Dogherty, John
- Duffy, Michael
- Gallagher, Bryan
- Gallagher, Edward
- Gavan, James
- Gavan, John
- Jennings, Joan
- Kelly, Andrew
- McAvaddy, Michael
- Molloy, Thomas
- Muldowney, Anthony
- O’Donnell, Edward