Heinrich O’Donell, Count O’Donell of Tirconnell1 
Eveline O’Donnell1 
Maurice O’Donell, Graf O’Donell von Tyrconell1 
He was Imperial Chamberlain.1 He was created Graf O’Donnell [Austria-Hungary] in 1886.1
Child of Maurice O’Donell, Graf O’Donell von Tyrconell and Princess Helene Cantacuzino
- Henry O’Donell, Count O’Donell of Tirconnell+2 b. 1845, d. 1907
Child of Maurice O’Donell, Graf O’Donell von Tyrconell and Clothilde Hardegglatz
- Hugo O’Donell, Graf O’Donell von Tyrconell+2 b. 7 Nov 1858, d. 13 Sep 1904
Clothilde Hardegglatz1
Child of Clothilde Hardegglatz and Maurice O’Donell, Graf O’Donell von Tyrconell
- Hugo O’Donell, Graf O’Donell von Tyrconell+2 b. 7 Nov 1858, d. 13 Sep 1904
Hugo O’Donell, Graf O’Donell von Tyrconell1 
He gained the rank of officer in the Austrian Army.1
Child of Hugo O’Donell, Graf O’Donell von Tyrconell and Marie Gabriele Sidonie Emilie Anna Gräfin von Thurn und Valsássina-Como-Vercelli
- Douglas O’Donell, Graf O’Donell von Tyrconell+3 b. 10 Mar 1890, d. 1970
Georg Friedrich Graf von Thurn und Valsássina-Como-Vercelli1,2 
Children of Georg Friedrich Graf von Thurn und Valsássina-Como-Vercelli and Mária Gabriella Gräfin Pálffy-Daun von Erdöd
- Marie Gabriele Sidonie Emilie Anna Gräfin von Thurn und Valsássina-Como-Vercelli+3 b. 17 Oct 1862, d. 2 May 1938
- Karoline Sidonie Gräfin von Thurn und Valsássina-Como-Vercelli2 b. 5 Oct 1863, d. 29 Feb 1944
- Vincenz Georg Wilhelm Graf von Thurn und Valsássina-Como-Vercelli+2 b. 22 Mar 1866, d. 6 Apr 1928
Children of Georg Friedrich Graf von Thurn und Valsássina-Como-Vercelli and Eugenie Gräfin Vrints zu Falkenstein
- Franz Johann Duclas Graf von Thurn und Valsássina-Como-Vercelli+2 b. 10 May 1876, d. 26 Jul 1939
- Dr. Alexander Georg Ghislain Graf von Thurn und Valsássina-Como-Vercelli+2 b. 3 Feb 1879, d. 5 Mar 1962
Marie Gabriele Sidonie Emilie Anna Gräfin von Thurn und Valsássina-Como-Vercelli1,2 
Marie Gabriele Sidonie Emilie Anna Gräfin von Thurn und Valsássina-Como-Vercelli usually went by her middle name of Gabriele.2
Child of Marie Gabriele Sidonie Emilie Anna Gräfin von Thurn und Valsássina-Como-Vercelli and Hugo O’Donell, Graf O’Donell von Tyrconell
- Douglas O’Donell, Graf O’Donell von Tyrconell+3 b. 10 Mar 1890, d. 1970
Douglas O’Donell, Graf O’Donell von Tyrconell1 
He gained the rank of officer in the Austrian Army.1 He fought in the First World War.1
Children of Douglas O’Donell, Graf O’Donell von Tyrconell and Elisabeth Maria Seraphine Anna Barbara Theresia Ottilia Margareta Antonia Gräfin von Uberacker
- Mario O’Donell, Count O’Donell of Tirconnell3 b. 1920, d. 1972
- Douxi O’Donell, Count O’Donell of Tirconnell3 b. 1921, d. 1943
- Gabriel O’Donell, Count O’Donell of Tirconnell+3 b. 1922
- Johannes O’Donell+3 b. 1926, d. 1999
- [S37] BP2003 volume 2, page 2976. See link for full details for this source. Hereinafter cited as. [S37]
- [S266] World War II Unit Histories – Officers, online http://www.unithistories.com/units_index/default.asp?file=../officers/personsx. Hereinafter cited as World War II Unit Histories – Officers.
- [S37] BP2003. [S37]
Count unknown Uberacker1
Child of Count unknown Uberacker
Elisabeth Maria Seraphine Anna Barbara Theresia Ottilia Margareta Antonia Gräfin von Uberacker1
Her married name became O’Donell.
Children of Elisabeth Maria Seraphine Anna Barbara Theresia Ottilia Margareta Antonia Gräfin von Uberacker and Douglas O’Donell, Graf O’Donell von Tyrconell
- Mario O’Donell, Count O’Donell of Tirconnell2 b. 1920, d. 1972
- Douxi O’Donell, Count O’Donell of Tirconnell2 b. 1921, d. 1943
- Gabriel O’Donell, Count O’Donell of Tirconnell+2 b. 1922
- Johannes O’Donell+2 b. 1926, d. 1999