Catherine Sinclair
- Yes, date unknown(
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- 1 Catherine Sinclair [1] d. Yes, date unknown
- John (Sir) (3rd Bt of Alva) Erskine d. 12 Mar 1739
- 2 Charles (Sir) (4th Bt of Alva) Erskine [1.1] d. 2 Jul 1747
- Henrietta Fraser
- 3 Daughter Erskine [1.1.1]
- 3 Daughter Erskine [1.1.1]
- 2 Sir Henry (5th Bt of Alva) Erskine [1.2] d. 7 Aug 1765
- Janet Wedderburn d. 1797
- 3 Sir James (2nd Earl of Rosslyn) St Clair-Erskine [1.2.1] b. 6 Feb 1762 d. 11 Jan 1837
- Henrietta Elizabeth Bouverie b. 1771 d. 8 Aug 1810
- 4 James A (3rd Earl of Rosslyn) St Clair-Erskine [1.2.1.1] b. 15 Feb 1802 d. Yes, date unknown
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- 4 Henry Alexander St Clair-Erskine [1.2.1.2]
- 4 Henry Francis St Clair-Erskine [1.2.1.3]
- 4 Janet St Clair-Erskine [1.2.1.4]
- 4 James A (3rd Earl of Rosslyn) St Clair-Erskine [1.2.1.1]
- 3 John St Clair-Erskine [1.2.2]
- 3 Henrietta Maria St Clair-Erskine [1.2.3]
- 3 Sir James (2nd Earl of Rosslyn) St Clair-Erskine [1.2.1]
- 2 Charles (Sir) (4th Bt of Alva) Erskine [1.1]