D.T.E.M. Armstrong
(
= Descendancy chart to this point, 
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- 1 D.T.E.M. Armstrong [1]
- + T.G. Smith
- Peter Frazer Strudwick
- 2 S.D. Armstrong [1.1]
- Giuseppe Andreotti
- 3 A.K. Andreotti [1.1.1]
- 3 J.C. Andreotti [1.1.2]
- 3 A.K. Andreotti [1.1.1]
- 2 T.D. Armstrong [1.2]
- R. Oostdam
- 3 L.K. Oostdam [1.2.1]
- 3 O.R. Oostdam [1.2.2]
- 3 L.K. Oostdam [1.2.1]
- 2 D.P. Armstrong [1.3]
- D. Roberts
- 3 A.D.T. Armstrong-Roberts [1.3.1]
- 3 A.D.T. Armstrong-Roberts [1.3.1]
- 2 S.D. Armstrong [1.1]
- + T.G. Smith